Does Fast Charging ACTUALLY Ruin Your Battery?
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- čas přidán 24. 03. 2022
- 60 watts? 120 watts? 240 watts? Here's what REALLY ruins batteries, explained.
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/ mkbhd - Věda a technologie
You're becoming more of a truth seeker and journalist than before, you're adding a lot of value as you evolve beyond just reviewing tech to actually help us understand how it works. Thank you Marques.
I’m loving this type of content, and glad to see everyone else is supporting it
Lol shut up
not even 30seconds in and he says that the older iPhones charge with 5W which is not true. The included charger is 5W but even my iPhone4s could charge at 12W back then.
@@tamron6014but that was the old 30 pin connectors on the iPhone 4s correct?
Well spoken
Ok, fast charging allow you to charge FAST between 20% to 80% (in 10 minutes with a 120W fast charger). This interval is perfect to preserve battery life and doesn't create much heat. I have a 120W fast charging phone and after one and a half year, I lost ~4% of battery capacity (I use Accubattery to estimate the battery degradation). Basically my battery life hasn't really decreased and I don't have to wait for an hour to use my phone again.
@@davidjacobs6244 You will understand the virtues of fast charging when you forget to charge your phone and need to leave your house in the next 15 minutes.
@@davidjacobs6244 spotted the iPhone user
@@davidjacobs6244 That's not the point.
@@davidjacobs6244 That’s a dumb argument. I normally charge my phone via MagSafe. But sometimes I gotta take my MacBook power brick to make it charge „quite quickly.“ So yeah. I would love to have some settings to say WHEN and HOW I would like to charge my phone.
@@davidjacobs6244 When you're a power user (Max brightness, 120Hz, 5G, Bluetooth etc), when you don't have a computer, when you play high demanding games, you need to always have your phone running...
Many years ago I was a programmer writing software for a battery development lab. One of the biggest things that we were working on was the most effective way to charge particular types of batteries. We had engineers, chemists, physicists, and, of course, programmers involved. An astounding amount of science for a simple process.
Would you be able to tell me what is the best way to charge an iPhone?
What company?
just dont leave it at 100% for longer periods of time, and use it normally.
If you plan to have phone less than 2years it almost doesnt matter and just don't bother@@MurtazaK1
may we know what the most effective way is?
@@MurtazaK1 The best way to charge an iphone is to take a cable, plug the cable into the phone, and then plug that cable and phone to a power outlet.
I hope my comment is very helpful. If you need help with other complicated things such as how to open a door or how to walk, just let me know and I will help you.
Sometimes I think we as consumers have become desensitized to how amazing our technology is. I like this type of content
For real, go to even just the year 2010 and wow!
It ain't that amazing. We need batteries that give days of screen on time. Battery capacity technology hasn't improved much for the last 10 years.
@@farzana6676Because solid state batteries are too expensive and too difficult to manufacture at the moment to be produced on such a mass scale that phones require. I'll be another 5 to 10 years minimum before we start seeing solid state batteries enter consumer markets. Toyota is teasing solid state batteries for their EVs for 2027 but I couldn't imagine the cost for that unless they made a good breathrough nobody else has yet...
this comment is so dystopian "as consumers"
@@farzana6676there isn't much to improve, nowadays we have basically reached the limit of how much battery we can fit in modern phones, phone size has pretty much doubled since the last decade and reached a size and weight on the limit of what is considered usable for a phone, therefore longer battery life is achieved through software optimization and more efficient chips and engineering, that's the whole reason fast charging exists in the first place
As a retired engineer who specialized in battery technology, I'm here to say you've done a perfect job explaining battery charging.
simply no, there is so much over simplification. Like it is just wrong at this point.
Agreed, He says "batteries are kinda like a spunge, they absorb the most energy when they have the least in them". As far as I know, batteries make way more heat when charged from nearly empty, meaning they need to charge a lot slower at that point. So the opposite of what MKBHD said.
@@elrippo649 it'sjust simplification, it is not wrong ;)
@@mggevaer260 except battery will charge more energy when they start empty, markes was right ;)
@mateo Yes, obviously it will take more energy to charge an empty battery to full than one that's not empty. But he says "and as it gets closer to full it becomes less and less efficient at absorbing energy".
So I think it's clear he was talking about rate of energy absorption, e.g. chatging speed.
Li-ion batteries simply can't be charged as fast when close to 0 as for example 15%. That's why if an EV maker for example claims "charges x km in x time", it will often be between 15% and 85%.
I just want removable batteries to make its comeback.
*ITS
@@michaeltran4546 ?
@@michaeltran4546 bro tryna be a grammar nazi when he don’t even know how grammar works XD
Meh, why would I want to do that? I think the phone would have to be plastic on the back and to being able to fold right open. Would feel cheap. Maybe I could pop the battery out to stare at it or to like charge it outside the phone idek good thinking
Hot swappable batteries in a tesla would be a game changer. Be able to recharge faster than a petrol station.
I love that your videos dont have background music ... & you speak to the audience at a natural pace. Also appreciate your effort to learn the stuff before conveying it to us, thanks bro! :D P.S. Love the humility in your speech, never change!
Marques, i am an old guy and you are absolutely the ONLY tech guy i trust and follow. I base all of my tech choices on your research and opinions. AND you have a magic personality. All the best to you young man. JT from downunder.
Never trust one influencer. Always do your own research and listen to different perspectives. Read more rather than just watch videos, especially videos that are watched by millions of people. The most popular videos tend to have mistakes/misinformation, an agenda, and/or politics involved (including being paid for by a corporation).
There are experts to listen to when it comes to certain aspects/fields of technology. MKBHD is a knowledgeable guy but not always, and he also happens to be the most popular American tech channel on CZcams (or one of them). Millions of dollars are behind his videos so sometimes he can't make certain statements without risking millions of dollars in sponsors, ad revenue, and business. These are things to be aware of when basing all of your tech choices on one person's opinion. Doesn't sound like a good idea now, does it?
@@vigilant_1934 hey pal, i am a 60 year old history major, who earned his degrees by reading and research. Mind your own business.
Mind your own business is probably the worst answer you could've given to a comment that just advised you to be more thoughtful and open when making purchases.
Instead of being passive agressive you could've just said you think you are prepared and don't need their help.
But you do you
@@Hillbilly973 He was just helping you
grandpa you're rude
@@cliprimate_EXtinted
Go away.
Man I miss the days of user swappable batteries. You never had to worry about running out of juice. You just carried extra batteries with you and in just a few seconds you were back to 100%.
that sounds so cool, i used to have a phone you could take the battery out. that was the samsung j5. i could've done that! haha
External battery pack does the same thing doesn’t it?
@@lgray8044 no. You have to charge it, and its wired and larger than a battery
@@lgray8044 absolutely no, I have a pair of wireless headphones (Artics pro) and they come with a spare battery. Basically, I never ever ever charge them, I just swap the battery out. 100% battery in half a second. Trust me, it's amazing
@@2664k battery cases work too, plus phones with removable batteries dont look the best
It's mostly all about heat. If less heat is produced and more the heat is spread out, the battery doesn't suffer as much from charging and doesn't wear as much. I don't know what is the exact sweet temperature to achieve 80+ watt charging at, with the least possible wear, but it is hard to maintain as the battery wants to warm up as it charges.
Good to also mention that the battery degradation isn't linear to the charge cycles, but it starts off with a large wear amount per charge when it's new, heading to a more mild wear amount. For example, the first 150 charge cycles (lets say degradation from 100% to 97%) could degrade your battery as much as the next 300 cycles would (from 97% degradation to only 94%, instead of 91%).
the problem here is that he doesn’t mention tests on youtube that show these phones charging at higher temperatures. there really wasn’t enough independent testing shown in this video to answer the question. we can’t just take what a company says to sell their products as the truth
@@reganbrannigan3006 do u have a few examples, cause im actually curious, he mentioned that theres not a lot of studies on long term charging retention because these phones are newer, so id like to see if there is some stuff already out there
like actual experiments, not some dude showing his phone exploding or taking a one off temperature with no context
@@notme756 I didn't mean to say there was anything on the long-term effects, I just meant that there were videos showing the phones charging at higher temperatures and if that is true, according to this video, that would reduce the life of the phones. I'll find a link for you to a video showing charging temps
@Dikshit pratim Mahanta On Android I don't think it is possible. Try Google, you might be able to see how many charge cycles you have gone through even if you can't see the percentage
MAD RESPECT!!! This guy had a really good question, then did the research behind the answer. True hero!
A year later and people like me still search for this exact video. Thanks again Marques
Linus did some experimenting on this a while back, IIRC he found that it's less about how fast the battery is charged, and more about the range. Fully charging and discharging battery puts a lot of stress on it. Doing so repeatedly degrades the battery. Doing so repeatedly while also at high temperature, _really_ degrades the battery.
absolute nonsense. Lipo or Li-ion batteries do not heat up while charging. Only when overcharging.
NiMH and NiCD heat up while charging.
@@janklas7079 They absolutely do heat up when charging at high amperage, lol.
It's not just the internal chemical reaction, batteries also have internal resistance as well as the resistance of the circuitry.
Perhaps you should enlighten all of the engineers designing these products because they seem to be under the impression that Lithium batteries do heat up when charging. What a bunch of dummies.
/s
@@janklas7079 I'm guessing you watched 0% of the above video???
@@CharlieMikeNS No they do not. I charge lipo's with 5C if in a time crunch.
The internal resistance? That would be true for NiMC and NiMH. The typical internal resistance of a lipo is in the megaohms, so that can NOT cause heating up.
In fact, after use my lipo's are hot, and they cool down while charging.
I'd certainly take a thicker phone if it meant improved durability, sd card slot, and room for a larger, and/or user swapable battery.
Well removable batteries are no more
The sealed batteries will be around forever
Fairphone?
The best alternative solution is just get one with almost double the capacity you'll ever need in a day. Even that might be overdoing it. Unless you forget to plug it in some days. It will not ever be a nagging issue for you before you replace your phone to keep up with better security of later OSs that you can't upgrade it to.
Don't forget the headphone jack
If you can't get a high enough capacity battery to satisfy you with all of the other features that are a must for you, I suggest keeping a separate portable power brick with you and top it off as needed. Anker is a highly rated and trusted company for making like products.
don't activate french audio on this video, it's a nightmare ...
J’ai pensé que c’était mon iPhone 😂
Sérieux c’est affreux cette piste mieux vaux la supprimer lol jcomprend pas pk il la laisse …
😂 😂 😂
Jajajqjqjajajajqja
Lol😂
Love your videos, keep up the good work. I know it's a lot of hard work getting out good quality videos 👍
Hey Marques! I worked in the battery industry for 7 1/2 years. I can tell you that if you are very worried about battery health, long term, use the slowest charger you can and don’t use your phone while charging. Charging solutions are improving but lithium batteries have not changed much. I use the 5 watt charger still on a timed plug overnight. My iPhone 13 Pro’s battery health is at 99% still, I have had it since launch. I actually tested this theory with my iPhone 12, I used the 20 watt charger instead and sometimes wireless charging, both of which cause more heat. I saw much more battery degradation in the same time period. I am super interested in what some of these companies have done the last several years and ultimately I think some developing technologies that are on the horizon will solve this issue entirely.
Update: I think a lot of you missed that I prefaced my comment with “if you are very worried about battery health”. One more tip, if you have a device you plan on keeping for years and don’t always need the full battery life then you don’t need to charge it to 100%. For example, I have an iPad I use mostly at home. I will often charge it to 70% or 80% then stop. I usually only charge it 100% when I am taking it on the road with me. Follow these steps and you can expect your device to have 95-100% battery health for a much longer time since much of heat and battery degradation occurs at the end of the charge in that 90-100% range.
Is it ok to use your phone while charging as long as it doesn't generate heat like using a low battery consumption apps? I've done it on my old phone and it still seems fine after 5 years till now. I upgraded to Xiaomi Poco f3 with 33w charger a month ago, I usually only use phones to a read comics, novels etc. Which doesn't consume to that much battery.
The best solution is use fast charging when it is really necessary but it should not be very often. Not all phones have software to stop charging ta 80%
You should always use slow charging all the time except when you really charge quickly.
People who use phones no more than 2 years or tech reviewers who get new phones almost free every year or people who can afford to upgrade yearly can use fast charging everyday.
I also have the iPhone 13 pro since it's release. So I have been dailying it for about 5-6 months emptying the battery and ending the day always between 10 - 30%. I have always been charging it overnight with an old 5w iPhone charger. Battery health still at 100%.
My car has no AC, hope I get a new one, and that Samsung A21 does better than HTC M8. It's just HOT here in the summer. Do rugged phones use LTO batteries?
The HTC M8 batteries were garbage, so happy to have left it behind, but I still like to go to the beach!
This has got to be my all time favorite MKBHD video! It's literally everything you need to know about your phone battery.
I love all the information packed into this video, extremely educational. Had no idea about the gallium nitride charger, the question of heat, and the bending in Galaxy Note 7 causing the fires! I guess this maybe explains the rectangular sharp cut designs?
Wow, this was actually a really good video. Recently purchased a S23+ and a 45W charger but I saw in another video that it makes almost no difference from a 25W charger. Maybe like 10 minutes in charging time. I went with the S23+ for a bigger battery and faster charging speed. So far I am unable to drain the battery, it's very energy efficient. Thank you for this video.
The s23 actually charges slower with the 45W. So does my S20 and S22 ultra even though they have larger 5,000maH
Jus got an a54. I hope it's like that for me. Sshhhs that sounds great
@@daggermouth4695yeh that's cause they're supposed to bro. They're capped at 25W only the 23plus and ultra can use 45W
@@daggermouth4695as the person said below. Using a charger that provides more current will not make the phone charge any faster than the charger you got originally with the phone. Current is only pulled by the load. Only way a device charges slower is if you use a cord or charger that provides less current than what was provided.
As far as I am concerned what is damaging is using fast chargers that provide multiple voltage rating
@@Papa_Straight not according to the Samsung specifications, it says
" both s10+ and s20 support 45W charging "
Awesome video. I appreciate the research you did for this. Thanks ! 👍
An actual test of this would be fun. Charge a few different phones at different wattages over 100 cycles, measure heat during charge, and measure capacity at the end.
Wouldn't charging multiple SAME phones at different wattages over 100 cycles be more fun?
phone batteries have to be on the list for linus' lab, once that gets up and running
@@naveengodara42 no because that would give you useable data 👍🏻
the real test would take a year or 2
to compare the life of the battery
Same Phone, 1 normally charged
1 Super Fast charged, see if the fast charge 1 fails or falters, otherwise were good!
@@zodsinclair8500 therein lies the problem
Reviewers only get clicks/watchtime on their reviews during the short period when the device is being launched. If the thorough test takes 2 years, not many people will watch when they finally publish results (most customers have already bought the device / don't care). There's definitely a market of consumers who buy old phones, but is that market large enough for reviewers to be incentivized to do this?
The battery health on my 30-month old iPhone 11 Pro is still at 100%.
I can’t explain it, but I’ll certainly take it.
That’s actually incredible
How?!
How???? I have a base iPhone 11 and my battery health is at 72%, I bought it February 2020 ;_;
@@mkbhd you don’t say
@@Muser0168 he wrote
Thanks for the clear explanation man! This was exactly what I was lookin for
This is something I always wondered about, thanks for a very informative video
Would have been nice to mention that even before fast charging, expected battery life was kind of about the same: after around 2 years, it was normal to lose 20% of your battery capacity
I felt that was made clear when he said that 80% after 2 years worth of charges is the industry standard
So has battery chemistry improved and you are giving up a potential longer lifespan for faster charging? They may sacrifice some design capacity for high charging capabilities also. There is typically a sweet spot between charging speed and lifespan and it drops off quickly after that.
Lifespan was way less of a concern when phones had removable back covers. Now your stuck with the battery you got for likely longer then 2 years as advancements in phones have slowed down.
@Amoled 18w is still relatively low. People were complaining about how slow the 23 watt Pixel 6 charging limiter was, which Google reportedly did for battery longevity reasons. Modern fast charging is like 40-50W.
I traded in my iPhone 11 to a 13 pro and my 11 after 3yrs of usage had a battery capacity of 81%. Its not bad tbh
They start to degrade after 500 charges. That's roughly a 1year or less lifespan. We have to start defending the return of removable batteries
You know, you have played too much Elden Ring when you recognize this sound 0:54 on a tech related channel!!
you are the only comment that mention this, cheers tarnished
Only maidenless runt’s will notice this sound 😈
It's the Enemy felled sound effect
Totally thought I was watching an Elden Ring video when that sound came up but then realized it was MKBHD 😂. Maybe he's been playing too. 👀
Enjoy your arteria leaf
Very well documented, the depth of knowledge in 12mins. Hats off
Awesome video bro. Brilliantly researched and presented. I work with all different types of batteries for work and I agree with everything you said. 👍🏼
0:55 love that elden ring sound
It would be interesting to make wireless charging more effective by have a charging pad that measures the temp of your phone and can cool both itself and the phone to reduce the heat created by the coils
Some wireless chargers have small fans to keep themselves cooler, not sure if it helps the phone.
@@QualityDoggo Any heat reduction, including that which the phone absorbs sitting against the pad will be an improvement.
Created a problem by wireless charging then you want to create a solution to that problem. Nice✌️
@@ritwiktiwary8631 wireless charging isn't a problem, it's an option
@@narufan987 heat and inefficiency is a problem from wireless charging lol
This is the best video that did not knew i needed to understand chargers and all that stuff
Just listen to the french audio track, it's one of the funniest things I have heard 😂
Très bel audio
Yeah wtf was that💀
One important thing to note is that Apple is rating your iPhone's battery health by comparing the actual change capacity to the designed capacity, and NOT the manufactured charge capacity.
The battery manufacturing process is not perfect so most batteries come out with 3-7% larger charge capacity, and that is why many iPhone users see their battery degrading only after 6-10 months of usage.
Actually, batteries can also be smaller than what the spec sheet says. It's not typical to have 3-7% more but it can also be 3-7% LESS. That's why most Android manufacturers have to capacities listed on their batteries: typical and rated. They're advertising the typical but reality often is the rated capacity.
Apple also always underestimates the charging cycles. So 500 cycles is just the MINIMUM the battery should last, not the maximum like most others are listing. In reality, iPhone batteries often last a hell lot longer than those 500 cycles.
Battery degradation is also not linear. Back on my iPhone X for example it took about 3 months to degrade from 100 to finally show 99% but then from 99% to 95% it was only about 2 months and a while later it stuck at 92% for almost half a year.
the battery degradation thingy on iPhones sucks and has 0 accuracy, aida64 /accubattery/ whatever thing with root on android shows a much more accurate one and its actually pretty linear, degrading more the more its degraded and then kinds sitting in the 70-80 range
its literally impossible that your battery is perfectly 92% health for 1 year, its just a inaccurate number, batteries degrade over time even without charging them and stored perfectly in a cool dry environment at 60%.
Literally every single charge scrapes a bit off your battery's max capacity, kinda like water flowing over a rock and removing material over time
its more linear than you think, the irregularities are external factors : like aggressive or normal usage (using your phone to play games and battery is pumping max output also causes a lot of wear compared to just random use), difference in the environment heat such as Winter or summer time, or its just you charging your phone less times on average in a time frame, or, inaccurate % number.
but batteries in a controlled environment actually degrade linearly, batteries "are not designed to wear out" so when it happens its "random", but there are so many cells that the casualty gets averaged so you get a consistent pattern of degradation at each cycle , where a new battery is fully functional but has to pump a lot more electrons compared to the same battery but degraded, at the same time, the degraded battery is not fully functional so is more prone to failure even if its working with smaller capacity, you get consistent wear for different reasons.
My 12 pro max is still at 100% after 10 months of use. Guess i got a lager capacity one? Or always charging the phone to 80% and never from bellow 10% actually helps.
My 12 mini lost around 3% in 4.5 months
I’m on an 11 with 90% after 1 1/2 years
Phones are so advanced now, between the power management system and the machine learning in the software, I just plug it in or out whenever I need to, and keep it from getting hot, and it works great. I still avoid inductive charging but I'm probably a relic...
Probably you will use inductive charging when the portless iPhone 14 arrives.
I mentioned this more extensively in another comment but curious on your take. Is it not odd that companies are trying to focus on charging faster and wirelessly, which produce more heat, over actual battery life improvements? Current battery tech won’t have much more improvement that can be made on heat dissipation. While it keeps companies pockets lined. I feel it would be much more practical to at least work toward phone batteries that can last 3-7 days. Reducing the amount of times a device is plugged in, because of a longer lasting battery, seems more practical to improving battery longevity.
Ex: A phone can get to a battery capacity to be charged only twice a week that’s 104 charges in a year roughly. Which is 72% less charge cycles (and less heat generated and dissipated) than most phones now which are charged daily at least.
@zshxho Machine learning can be used to simulate and optimise solutions incredibly quickly and efficiently.
On one hand, an engineer in a laboratory is spending months testing batteries to understand the most optimal charging power function to provide the most power in the shortest time combined with the greatest longevity.
On the other hand, you could give your optimal temperature, battery life, charging time and other variables to a computer program that spends a single week simulating batteries and coming up with the same, or better solution in a fraction of the time and cost.
Now I'm not a software engineer but in essence this would be a goal for machine learning in battery charging technology. Machine learning is also used while you are using your phone to control how much power is being dedicated for different services and turning them off when they are not needed to conserve energy and increase the life of the battery.
I'd assume some phones use a service installed to constantly monitor the charging state and communicate live with the charging brick to optimise the charging cycle instead of just feeding a dumb, non-adaptive function. So even if each phone is made with a battery of varying quality, the phone will still get the longest life possible.
Yeah same here
@zshxho Samsung calls it adaptive charging as they love their settings. Apple just does it in the background. It learns your charging routine so if you charge overnight it knows this and will charge up to 80% and keep it there until an hour before you wake up and then top-off to 100%. This helps with battery cycles by increasing them.
Great video Marques. Thank you. The best analogy for battery charging that I have seen is that of a huge parking. Imagine a huge, empty parking lot. When a car enters the parking lot, it can speed to any space in the lot. But, as the lot fills with cars, subsequent cars have to slow down to avoid collisions and damaging other cars attempting to park or already parked in the lot. The more full the lot becomes, the fewer spaces remain, and the slower cars must travel to avoid collisions. Your battery is the parking lot. Your charger sends electrons "cars" into the battery "parking lot". When your battery is empty, the electrons can fly to the cells in the battery. As your battery fills, the charger must send fewer electrons so as not to damage the battery cells.
u have no idea how much we trust you and how much those videos help us , thank you
Remember 6 or 7 years ago when this didn't really matter on anything except an iphone?
Down to 60% capacity after a year and you can't afford to replace the entire phone yet? Just buy a new battery for $20-30, and no proprietary tiny screws to remove, adhesive to melt, screens to pry off with suction cups while trying not to break anything, security chips to reprogram...
The American model has won
@@martin8313 and miniaturisation and being water proof. If you don't want that, buy a fairfone.
@@EVPaddy Galaxy S 5 had water prove and an easily exchangeable battery
@@utuber7600 Well, iPhone 6 was the best selling smartphone model of 2014.
@@aninditabasak7694 …what does that have to do with battery replacement?
Something to consider on the battery health, as you lose charge, you'll need to charge your phone more often with the loss of capacity. So saying you're "on track" to have 85 percent is not taking into account that you'll charge more as you use them.
and cases, wireless charging cook batteries
@@colindoyle9876 that’s a lie my dude. Modern phones don’t really heat up during wireless charging. Proof: my XS Max bought at launch, sold it with 87% battery health on original battery. Lasted the whole day without problems before I sold it, charged only using a 7.5W cheap wireless charger throughout its life. That’s a 4 year old phone.
@@37racso What case?
@@37racso My 8+ is at 90% heavy use since day 1 of release. No back on phone to trap heat
@@37racso That's good. My S10e heats up quite noticeably during wireless charging. When picking it up from the wireless charger, it's not hot but it's warm on hands.
Very solid jnfo and exactly what I was looking for. Your style of presentation is easy to listen to. Thank you.
Your reviews are spectacular. Thank you.
I feel like the benefit you get from fast charging helps to retain the battery life. If my phone took 2-3 hours to fully charge, I'd often leave it over night to charge, but with fast charging I usually just plug it in here and there for a few minutes and I have an app that alarms me when the battery is at 80 % so I unplug it. That way I extremely rarely charge it to full and pretty much never let it go below 20 % saving quite a bit of battery life. I have a OnePlus 6T that I bought when it launched, so about 3,5 years ago and my battery health is still at 87 % always charging it with the 30 W fast charging.
That Oneplus 6t is a pretty good early indicator that the technology works well. But still we still gotta see how the 65, 85, and 120w chargers behave in the same amount of time.
Yes. That’s exactly how I do it. I’m kinda homeless so I have my standard 5w box and cable for at home wherever I may be staying overnight whereas my c-type charger is for when I’m out and about and on the go. I need to buy a type-c power bank since the one I’m using right now is only standard USB.
Whats the app
@@FakeExotic AccuBattery
I dont know how one plus is,i never had one, but i like them a lot. i had an huawei mate 10 pro. when it came out in 2017 had 22.5w super fast charging. the phone had "inteligent charging" and automatically stop charging at 80%. usualy i leave it overnight everynight. when i bought it. the battery lasted two days for me(medium usage) after 3 years of charging it overnight nearly everynight. the battery was in good shape. i had a full day with that phone. the i just got an Samsung s20 FE 5g. bigger battery 4500. faster charging 25w. and after full charge i just realize that my old mate 10 pro is still on for an entire day,when my brand new samsung just needs a charge after 8PM. also the huawei mate 10 pro after a full charge the phone disconnects from the battery and stays powered by the charger. normaly in the morning when i took it out usualy went from 100% to 99-98 instantly. my new samsung never did this. sorry for my bad english btw
I really just want a smart phone with a replaceable battery. Like a panel on the back I can pop off and pull the batter out rather than having to fully disassemble the phone.
lookup rugged phone. "rugged android" surprisingly many options available, but you do pay a premium for a more mainstream brand that will still fall a bit short of the off brand claimed specs. (whether true or not)
Used to be the case but now there no option on these newer, worse phones.
Then you’d run into issue with people buying 3rd party batteries because even if manufacturers forbid or lock that, China will come up with a solution and 3rd world demographics (no disrespect as I am part of) will opt for that. With 100 plus watts chargers and that, a 3rd party battery is a serious fire hazard waiting to happen
@@nazmulfahad3044 they'd adapt
didnt they used to do that?
Very competent research, well delivered and very interesting. I'm feeling more appreciation for phones now than 15 minutes ago.
I only buy things tech if this guy does a good review. Only CZcamsr I trust when it comes to honest review for anything tech. Got to the point if I don’t see him doing the review I don’t watch it. Keep up the good work and may God continue bless you and your team!
"I'll link one of them below the like button." 3:13
THAT WAS SO SMOOTH
Super informative, would love more videos like this! Longevity and reliability of tech is honestly really overlooked in most tech reviews, so I’m glad to see more stuff like this!
Very informative! Thank You!
Your in-depth analyses are amazing! Thank you for all that you do to keep we techies informed.
i always feel like am watching a high production movie at 4k everytime marques uploads. The spatial sounds, detail to color scheme just amazing! And yes i don't think there's another youtube channel that feels this way. No idea what you do behind the scenes but keep it up!
As a person who is not trained in videography, I don't see the difference though.
He always been a benchmark on yt
MrMobile is also very good in my opinion.
@@realtimeflies4679 you have not trained enough young padawan
Hello bot
I work with li-ion cells and have found out that slower charging rates tend to give longer battery life - primarily because of the heating of the cell(s) becoming lower.
The large surface area of the battery can be a large heatsink. But yes thermal runaway can be an issue. If only LiFePo4 can be shoved inside a phone, also I have found out that there's no limit on how much amps on a battery as the bms immediately cuts it off, I actually tried it with my li ion powerwall
Use 3310 then
Another battery killer is charging over 4,2V.
@@blurcak it depends on what battery you are using. 4.2V is the limit for most batteries with a nominal voltage of 3.6Vr or 3.7V.
Phone batteries have chemistries which allow them to go higher. Nominal voltage is 3.85V and max is 4.4V.
But in general staying away from the top end lets your battery live longer.
So would wireless charging overnight be better vs cables? It's pretty slow.
I really like the way you present your topic. Thank you.
From a chemistry PhD student point of view, your explanation of the battle of batteries was exceptional! You explained all the essential info without getting to technical. Congrats
I research batteries for a living and This is something I always thought of when I see companies advertise fast charging. It was interesting to see you cover this in detail and actually explain the science!
Right? Could you imagine using a defribulator on your battery and it goes from 0% - 100% instantly? Lol
Shouldnt u already know this if ur job is researching batteries?
@@Ali-ol7pk I do. It’s because I understand what happens when you fast charge and it’s implications to battery life, I am interested in the different approaches by companies. Someone like MKBHD making videos like this and explaining the science to a typical customer is really interesting to me!
@@Prash106 oh okay then
As a R/C battery geek i was really disappointed. No testing and mainly using manufacturers own claims and data (e.g. Apple battery life percentage).
I used to work for one of the companies mentioned in this review as a part of their product team and “charging speed” and “battery life” are the only two things the team focuses on, not “battery longevity”. This is because in the market studies we used to do, no customer would ever say that battery longevity is important for them, and that’s because most people are not aware that batteries degrade over time and that there is an inverse relationship between charging speed and battery health. Even other product managers are unaware of this problem. They keep switching phones every 3 months or every year and never get to feel any degradation in battery health.
Samsung has an option to disable fast charging on its phones and I feel that’s a must-have option on all phones. Other companies feel that if they give the option to disable fast charging, then it would show their fast charging technology in a bad light, hence people won’t buy the phone.
@@outerspaceimp I agree. The thing with the firms you mentioned is that their primary market is China, and so everything is aligned accordingly. The biggest KPI for software teams is “how many new features we added”, and so every new release will have n number of new and unique features. The western concept of having a product manager for a particular feature and then that PM charts out a roadmap for the feature that spans a few generations of software versions is not followed in Chinese firms. Also, there is a lot of shuffling around of people. A software PM today would be working in sales tomorrow, and vice versa. So there’s little sense of ownership for the feature and hence no long term vision. Things like battery health will be added only when a large number of people start demanding it. Right now only enthusiasts are aware.
Well then I think the company you worked for doesn’t have loyal customers if they think their customers are going to switch phones every 3 months. For companies who have loyal customers that use the phone until it broke or no longer supported (like apple), they will have to think about battery degradation, and now even have to show battery health as part of transparency process required by the public.
@@ChenLiYong I actually thought the same but market insights data showed us that we had a higher than average repeat purchase from customers. Slowly I started to understand that I am an enthusiast but a “regular customer” has a very different perspective on technology and different expectations. For Android phones the lifespan for a phone is 2-3 years, after which a person will get a new phone, either due to lack in performance or just poor battery life or everyone around them has newer phones. For iPhone that number is higher, at 3-4 years. I do feel that Google does think about customers long term but OEMs are happy selling more phones to you, so less incentive to spend resources on “long term” features. Apple can think long term because the cost of entering or switching its ecosystem is high, so people usually stick to iPhones. On Android there are so many choices that customer loyalty is inherently much lower (as compared to iOS). Out of all Android brands, Samsung enjoys the most loyalty.
@@ChenLiYong People switch phone recently have no relation with company loyalty. The switch phone with same brand tho, but more recent release. They want the newest phone sometime because want to upgrade the technology, new feature, new camera or sometime just to brag "i can afford new latest phone".
Thank you for the info, I did not know my Samsung could do this.
I have a Redmagic 7 Pro which uses with a 60W GaN charger. With one of those W measuring cables I noticed it charges about 56W then slowly rise to 60 when around 65% (doesn't go to max charge as soon as I expected).
If heats up too much during charging it drops to 30W until cool enough (but only if you're using it a lot since it has a cooling fan which automatically starts when plugged in).
On the other hand, charge separation (how RM calls the pass through charging) barely supplies 2-3W so it's really helpful for heat management and to avoid charge cycles.
Keeping up the great job of keeping us informained! 😉 TNX MKBHD
I can’t even begin to tell you how much I appreciate everything you bring to the table, Marques. I’ve been a subscriber and follower since your early college days and you really are one of the true greats in the space. Theres no doubt about it. Thank you for these wonderfully made, informational videos. Never a disappointment.
it's a scam it's not mkbhd giveaway
Apparently, the worst thing to do for your battery (apart from heat), is draining it all the way down to 0%. As the charge decreases, it's harder and harder for the battery to provide the same amount of power and using the phone while below around 10% will apparently cause irreversible damage to your battery.
Yeah this is true
Think of your battery as you would your stomach. Too much too fast puts a lot of strain of your stomach. Staying full all the time puts a lot of strain on your stomach. Starvation.....well, ya know.
The main issue of irreversible damage to your battery is if it goes to 0% and you toss it in a drawer for a year and you come back and it won't charge at all. These batteries will passively discharge over time and if it ever gets to the point where there's no electrical activate among the cells, they will go dormant or into a "sleep mode". It is virtually impossible to reverse this but sometimes with extreme temperatures (tossing it in the freezer) you can agitate those cells and "wake them up".
Most devices will not discharge a battery to true 0% charge, despite what the battery level meter says. They are designed to cut off at a certain safe level that won't damage the cell, and display that as "0%" of the usable range on the meter.
Where you can get into trouble is if you discharge the battery, then let it sit on a shelf for months, during which battery will continue to self-discharge to a point where the voltage is low enough that it WILL permanently damage the cell(s). To avoid this, I charge my stored devices to 80-ish% every three months to maintain battery health.
Edit: Ninja'd
@@jameshoiby yes, exactly...my phone's battery says on the top it's total capacity is 3410 mAh but rated capacity is -10% i.e. 3410-341=3069mAh which accounts for 100% of the battery capacity...instead of the whole 3410 as 100%
@@sh-bm3is how did you measure it? There is also power loss on voltage converter
Great video! If my phone starts getting hot I hold it over air conditioning to get it back cool again to save the health of the battery. Really interesting to hear the info!
Amazingly detailed video. Absolutely love it.
I love how Marques Explains Things, It’s easy to follow, packed full of information at the same time, while not being condescending at all.
Nice, been wondering about this for a while. I assumed phone companies wanted fast charging regardless of phone longevity so they can sell more replacement batteries and phones. Maybe we are moving in the right direction in terms of tech longevity.
Heat destroys lithium ion batteries. To extend battery life and double or quadruple the charge cycles don`t run the battery dead (dendrites form causing internal short circuits), and especially don`t leave it dead for any length of time if it does happen, and try not to charge it past 80-90% (damages the internal structure by forming cracks due to swelling blocking lithium ions from storing electricity). A fully charged lithium ion battery that gets exposed to heat (hot car) will lose a lot of its capacity and potential cycles. Also, charging a lithium ion battery in freezing temperatures damages it too. Try to keep it around 60% to 70% charged when possible and only charge it to nearly full if you have to for whatever reason. Don`t leave it fully charged though for long periods.
@@baneverything5580 Interesting, but i game on my phone and i need 💯 power
@@Keepskatin Well, that`s the science. It`s particularly valuable for those with expensive off grid solar battery banks.
@@baneverything5580 This is why I find fast charging actually improves battery health. It's way easier to avoid charging overnight and charging to 100% when you have fast charging. I plug my phone in for like 20 minutes a day and that's it.
yes maybe
This was awesome. Very well explained!
Some friends were saying I was still using the "oldschool" method of preserving battery by letting it get to
You can also just use a lower wattage charger if you're worried about fast charging... I charge my xperia 5 iii with a 5 watt charger, and have it set to only ever charge to 80%. that 80% still gets me through a full day of heavy use a year later.
I love when you scientifically explain things, makes you stand out as a tech CZcamsr! It would be incredible to see a series of videos like Veritesium but based on tech coming from you.
Veribatism is a scientist man with a high level of education, these people are just show offs!
Then why in the world... Did he not mention about the ability to bypass the battery when gaming while plugged into the wall with a charger that xperia phones have since "heat" is a battery killer?
Didn't even say a lick about that ability.
No heat while gaming on the phone sounds like it will drastically save your battery.
If it's about iPhones only then this is perfect channel for you since other ground breaking features (like on xperias) don't even get mentioned
@@iamdalibor True, mkbhd is an obvious isheep
"scientifically explain things"?
You mean when he gives a very, very high level explanation of the ions and the electrolyte solution?
If you genuinely think these people are "scientifically explaining things", you need to go back to high school and go back to your chemistry and physics classes.
@@iamdalibor He mentioned pass through charging for the rog phone 5...
Very nice presentation on this subject! You can take what you’ve learned to related uses in general:
- some of my bigger battery power banks actually charge faster if I unplug them to let them cool off after a certain percentage to plug them in later on.
- don’t put your phone on your car’s dashboard in direct sunlight when navigating. Use one of those air roster phone holders so your phone gets cooled by the car’s AC/ventilation while driving.
It`s very important to protect lithium ion batteries from heat, and especially fully charged ones. Causes rapid degradation and loss of capacity.
@@baneverything5580 this is why i use a cooling fan and stick it on my phone everytime i charge or play with it
The phone being way too cold also damages the phone so that’s also a bad idea.
@@kiwi8476 wait really? how so?
@@kiwi8476 Being too cold diminishes the usable battery capacity WHILE IT'S COLD; it doesn't do any permanent damage.
Thanks for the excellent video. I really enjoyed watching it.
I am a Linux developer that switched from Samsung to iPhone last December.
I have only been slow (low power) charging my iPhone during the night and yes I have noticed the smart software making sure the phone is only fully charged when I wake up at 6 AM. After 6 months my iPhone battery is still at 100% Maximum capacity!
As a physicist (by training), assuming that the whole system follows Ohm's law (yes that a bold assumption), the amount of Amps is what determines the heat production (P=VI, V=IR => P=I^2R). That's why modern electric cars use high voltage DC chargers.
At any rate, I am very satisfied with my iPhone, even when it is an older model. I will never switch back to Samsung. Samsung refused to allow me to remove M$ OneDrive from my new phone. The help desk of Samsung was actually rather rude. So I returned the phone as I do not want software from M$ on my phone. I will never buy Samsung again, no matter what.
love my power delivery display cable
REALLY useful with a solar panel and battery bank, to get a quick optimal angle check
Fantastic video, I used to obsess about keeping my phone between 80% and 20% - it's crazy how the landscape has changed and how fast we're able to charge these things.
I mean I still prefer to fast charge in 15min, from 20 to 80%. I hear a bip and unplug. That's it.
wat. that hasn't changed, it's just an omission of the video.
@@dandon1105 so what if he didn't? It was to show appreciation of the creator and it is his 2 dollars, not a thousand or some ludicrous amount. Most probably the guy was just trying to make sure marques heard the comment which he didn't or just to show that he appreciates him. Do you have an issue?
@@dandon1105if a stranger simply tipping another stranger on the internet sets you off, I can’t even fathom what someone living with you would experience. I really hope you’re just trolling
Very informative video, I learned somthing new today. Thanks MKBHD
thank you for really great video, this made me understand a bit better how it works.
this was actually very informative! thanks
A lot of laptops have a feature where they will advertise being charged to 100%, but behind the scenes are really going to about 95-98% then letting it drain, then topping back up to that amount.
I also noticed the newer samsung phones have an option to stop charging at 85%.
I literally noticed this just a few hours ago, installed Linux (elementaryOS) on my laptop and it showed the battery at fully charged, but when I hovered over the icon it showed it at 98%. Seems like Linux doesn't hide that stuff, haha. I know Windows/MacOS will just show 100%.
Asus ROG Phones also have a "Battery Care" feature, which will cap the battery charge to 80% except during the hours you specify, so you can have it reach 100% by the time you wakeup. I've seen people purposely rig the times so that the 80% cap is on basically all the time, so they never charge their phone to 100%, making their battery last even longer.
yeah I noticed after two years that my Asus ROG laptop has the 60% charge feature, and I am using it since then. I almost never use my laptop without it plugged in so this is a must.
@@sndrc9 My Asus Laptop had the feature through an app but the app disabled it for some reason
@@japzone yup, that's what I do. Except I've capped my battery at 90%, so it never reaches 100%.
Yes it can, but it's hard AF. I've been charging my Redmi Note 9 Pro to the full 30W charge, ever since I got him in December 11, 2020, and the battery still works just as fine as it did the day it came. (Not really because it's got a different Miui version + 2 years of use obviously affects performance) but it still lasts the whole day + a full morning or even sometimes 2 days.
Edit: loved the phrase "use your phone as normal", people often forget phones are supposed to work for us, not us to work for them.
I've got the same phone and always charged to 100% and I can't really tell a difference in battery life.
30W is fine. The problem is those 100W+ chargers. Or even 60 is already too much.
@@luigideff well 60W, is 30 by each battery, so still isn't a problem.
@@luigideff i'm sure that will change over time...
@@MvsG18 yea, true. Maybe that's a sweet spot.
Great video explaining this man. Thank you.
Thank you and nicely explained, with my Samsung S20 + i have always charged my phone/s at the lowest charging rate, its now over 3 yrs old and i have never had a charging issue, with any of my previous phones 👍
Nice breakdown of what I understood intuitively. I never thought fast charging is a problem because indeed it's always only the first minutes when it's real fast and it doesn't do that long enough to heat up much
This is one of those topics that you can find armchair tech experts fighting over on every corner of the internet. So refreshing to find such a concise and well researched video on a convoluted topic.
Thanks for finding some very useful information for us!!!
A classmate's thesis in college (electrical engineering) was characterization of lithium ion batteries and the effect of amperage and charge speed on longevity, the conclusion of the thesis is exactly what you've heard before:
Try to keep your phone between 20-80 percent if you're fast charging, avoid full cycles, and never fast charge 80-100, also yes fast charging has a negative effect on longevity but it's minimized if you keep it between 20-80
It is hard to find a “sweet spot”. Some say 30-90% some say 20-80%. I keep mine between 40 and 80% and charge it almost always on less than 10W. After 5 months my Iphone 13 pro max is still at 100% battery health meanwhile Marqueses is at 97%.
As you said battery health is also depends on SOC (state of charge). Going above 80 is not worse as going under 20. And I'd like to add that fast charging doesn't depend upon the user as the current battery charging system uses CCCV (Constant current till 80 for rapid charging and then constant voltage above 80 for slow charging) technic that's why you see different ampere and voltage ratings on the charger.
S22+ has a special mode to keep it a maximum of 85%. Is this OK too, or 80% is still better?
@@ClaudioProductionsX 80 is still a little better, but 85 is a lot better than 100.
Instead of being scared of these crazy fast charging destroying my battery, I'm more concerned of more and more companies creating their own standard that is out of USB spec. I have an old(ish) OnePlus brick lying around and it can't even charge any other thing over 10W.
Yeah because to support fast charging you need Power Delivery or USB PD. And your old brick is surely not. 😂 OnePlus started PD from OnePlus 8T itself. I can charge my Dell Laptop with the OnePlus 65W Power Brick. 😂😂
Yes!
my op7t charger powers led strip lights. learn to solder. pretty fun
you forget, its not just the device these companies made.. USB spec changes too..
And yet, everyone is only complaining about Apple and their proprietary port. Apple us using the universal Standard PD.
Love the video, very detailed ❤ now i understand 😊 thank you!🎉
Thanks Bhai Takimg UP The Confusion Topic ❤
What a fantastic presentation of electron flow, battery composition, and charging tech. Bravo Sir
About 45 watts seems to be a sweet spot. Charging and discharging full cycles, quickly, definitely degrades lith-ion batteries. My s21 ultra has a setting to keep it from charging over 85% to extend life a bit
This setting should be in every laptop!
@@georgwrede7715 ASUS laptops have it
@@idkwhatnonamemyself1951 I own Asus Rog G14 and it does have option to charge your battery upto 60, 80 or 100. Though the fact that's more fascinating is that if you install a Linux distro on it, and install asusctl on it, you have the option to change it to any number you like. 30,40,50 or whatever you want. Its quite insane that laptop manufacturers have the option but they won't do it
@@georgwrede7715 lenovo legion support
@@idkwhatnonamemyself1951 razer really needs this lol. I don't own one but everyone I know who has owned one has had to replace the battery at least once if they've owned it for over a year or two.
Thank you for your findings!
Super helpful thank you!!
I am a mobile repair technician and I've seen dozen of battery issues through out my 10 years of experience; a modern Battery with 5W or 10W charger should most likely survive around 3 years before showing any symptoms of degradation and performance; but the problem is not the power brick but the "HEAT". whether we like it or not all phones heat up under specific circumstances such as Gaming for a long period which draw more and more amp from battery to compensate the CPU/GPU needs which causes the Chipset to dissipate heat and that heat will reaches battery and effect electrons inside it. My Conclusion: use your phone in whatever situation you want, the batteries are one of the consumable parts of the phone and sooner or later you must change them to maintain their integrity.
That is not true at all. If you use you phone cleverly, the battery will survive at least 10 years without any problems. But if you belive that "fast charging does not damage the battery", then, you have to change your battery much more often.
@@richardkloubsky1299 that would be true under very specific circumstances; it varies on battery cells qualities; but a modern lit-ion battery would never last 10 years; the company’s financial income is based on selling batteries not persevering them to last longer that is why they wont provide you with a 10 years battery item
@@friends788 Well, I have 7 years old Nubia phone, and the battery still have 82% battery health (I havent measured it exactly, just with Accubattery app). But I have always charged it with 5W (5V, 1A), and only to 80%. I believe that if I used the original (faster) charger, the battery would have been dead now.
@@richardkloubsky1299i feel naked to say that Nokia is the only company which might be able to pull this up(high quality battery); but as i said earlier, it varies on your usage; anything that can heat up your phone raises probability of battery damage;
Do you game hard-core ? Like PUG or COD?
I believe NOT;
Simple game such as “Doodle Jump” or “Clash of Clans” does not effect battery;
So I’m guessing you are an average mobile user (no offense)
But I’m glad your phone battery still intact; not many people can take this good care of their phone for as much as you did.
Congrats anyhow ✌️
@@friends788 Yes, I am an average mobile user, I do not use my phone to play 3D games. Few times, the battery got cold (-10°C) or hot (45°C), but that was not very often. The point is, that if you take good care of the battery, it will last very long time without loss of capacity. My advices for long battery life are pretty simple:
Do not use higher charging current than 1C
Do not charge to more than 80% unless you really need it.
Do not charge the battery when it is cold (less than 0°C)
Do not let the battery get hot (more than 45°C)
As an engineer I appreciate the way you ar presenting technical terms and the research behind your explanations. Great video!
He also literally took the companies word for it with no real critical analysis or data to prove or disprove the claims of these companies. From an engineers point of view, this video is nothing but regurgitation of the company line
@@wiktorkawala6298 Well said.
@@wiktorkawala6298 And he mentioned iPhone everywhere, even tho iPhone has only 20W fast charging 😎🌝
That was an incredibly informative video. Thanks :)
Good informations, keep it going, appreciated.
Mil gracias Marques. Esta informacion me ayudo mucho porque no tenia la menor idea como trabajan las baterias y porque siguen cambiando la technologia. Saludos!
You're legit about to make a whole documentary on tech one of these days and I'd sit and watch the whole thing! lol
Keep evolving MKBHD! Much love brother!
I set up my bixby routine to trickle charge at night when I'm asleep for that reason. I try to charge my phone when it's less than 30% or so.
Back when i had the note 9, i had no issues with the battery too.
A side note: That feature that allows you to use your phone on charger without charging the battery is a kernel feature that can be added to any phone.
Much respect - you helped and I am sure others get a more realistic perspective on how this all works. Your knowledge and communication game is so next level. It is obvious you are a man and a company who cares about others. Keep up the good work. :)
If you rely on the information he provides, you are misinformed. He is making a number of mistakes, MAJOR mistakes like talking about the charging block and not the phone. The phone, which was designed by the manufacturer is ENTIRELY in control of the charging circuit. They could make a 1000 watt brick and your phone wouldn't charge any faster.
Okay, I understand the point of reducing the charging time from to 2 hours to like 20 minutes. But is it really reasonable to minimize it even farther? Seems like there is not much difference for the average user whether it charges in 7 or 15 minutes. It could be useful for big batteries, like in electric vehicles, where charging time is still a big factor, but in phones it looks like it becomes just a marketing tool, just like megapixels in phone cameras back in the day.
Yeah well it's hard to tell where development will get, as more functionality is added it's going to increase also the power demand of the devices. Which in return leads to new types of batteries and/or bigger batteries. Thus with the old 5-10W charging methods or as of now 120 W charging might not be sufficient/convenient enough anymore to power those future generations of batteries so I think it's actually pretty smart to keep researching.
“Back in the day?” LoL
The “108 MP” phones would like a word.
@@hellterminator yeah, but it became kinda a niche, since for the majority of customers megapixels are no longer a decision-making factor) cameras are valued as good or bad, but not by technical specifications, because software today makes more work than optics.
I need to go out in 10 minutes and my battery is 5%
@@binal-flecki2387 well, that's just some bad management
Marques this was a very well prepared video, good research and an over the top vocabulary. Keep up the good work.
I learned something new today...good informative video
You need to be an advocate for consumers. Don't let companies forget that they got rid of replaceable batteries. Every review should mention this.
Batteries are still replaceable. You just have to take the back off and unscrew a few screws. This really annoys me, because having spare batteries charged up and swapping them is more ergonomic than having an auxillery batteries plugged into the USB port.
But a lot phones have been glued shut. That means using a heat cannon to soften the glue, use picks or spudger to open it, only to find out the actual battery is glued jn too. As a bonus you lose the warranty.
@@akulkis what batteries are you referring to? batteries in modern phones are usually glued in to the phone, underneath a back panel that's also glued in. they're usually also attached with ribbon cables you need to unplug
Why would you need to change a battery? You can do 1 full day on every phone
@@4doorsmorewhors The premise of this video is that batteries wear out and lose their day-long capacity. Phone companies screwed their customers by making it easier to replace a phone than replace the worn-out battery.