Run a tablet without the battery! Something different here this time...
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- čas přidán 2. 12. 2020
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Hi
So, this tablet's battery, finally decided to give up...
And because of it, the tablet does not turn on...
Due to the way I use them, the battery is not really needed, but because tablets usually don't power up without the battery, I had to bodge it somehow...
I use this tablet, as part of my home sound system...
Long time ago, I made a video explaining how it works...
Video here: • Alternative Home Audio...
Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching! - Auta a dopravní prostředky
Not saying what type of capacitors nor explaining the capacitor values has to be... is pretty frustrating to me, how can we follow your steps without that information ?
very bad explanation
Not necessary. There is a different way. Do you still have the original battery? Unplug it from its controller board. Connect the power supply to plus and minus where the battery was originally connected to. The tab will think it is the battery powering it. I tested this with a Samsung Li-Ion cell. Still trying to find a power supply that has 4V and 1-2A. I think I saw people connecting 5V, but a fully charged Lipo is usually 4.2V. So, not sure if 4.5V or 5V supplies might damage the circuits.
@@InTheSh8
When you remove the LiPo battery and try to feed the TAB from the original USB with a standard USB charger, this is what happens:
1) Voltage
With battery you get a voltage to the TAB between 3.2V - 4.2V but with capacitor only between 0V - 4.2V
The charger normally delivers 5V which is regulated in the control board (for the LiPo) to alow maximum 4.2V
2) Current
LiPo can deliver very high current spikes, what happens especially when the device is going to start the main device program, or is starting a current demanding application like games, but with charger only it will be limited to 0.5A-2.4A.
3) LiPo replaced with capacitors
LiPo is delivering high currents, which with charger only, is limited. The capacitor is giving temporary backup help to the current spikes.
4) To do
- Use a decent 5V USB charger to get the 2.4A (boosted models 3.1A). With this only you can propably use the TAB without additional capacitors.
- To be on safer side, use the two capacitors as described at this video, soldered to the place of the detached LiPos + to + and - to -, voltage rating at least 4.2V and capacity as high as the usable space allows. The thin space could be utilized with smaller capacitors connected in parallel.
Luis 💪 big ups bro, when it's in you it's in you, people don't understand!
"Nothing to do with cars"
Actually I am researching this because I want to use a tablet in my car as a headunit and don't want the battery exploding on me 😁
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Fair enough...
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Me too 😅
Hi, I'm from China, I saw your content, thanks for your videos, I learned a lot. Thank you and I congratulate you.
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A great video .From a great engineer. Well worth a watching
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Thank you!
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Thanks for the video, there isn't too much out there on this. I just did this with a Samsung Galaxy Tab A 8.0 SM-T290 that had a bad battery. I used a 10v 220uF capacitor I bought from amazon.
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@@godschild5587 For voltage rating choose a capacitor at least double the input voltage of about 5, so anything above 10V would be fine. Then for capacitance (how many farads) choose the biggest physical size that would fit. The 10V 220uF caps I bought work, but I think it's close to not being enough. Good luck.
I can not see what he did in the video , do you connect the capacitor in series with the power or in parallel with the power?
I am going to assume in parallel
@@godschild5587 check your battery how much voltage
How did you connect the capacitors? Can you help me?
Hello~
Thanks for the good idea. I have one question. What kind of capbacitor did you used ?
HI lm can you please share how to use a correct capacitors? we have to measure battery resistance and use a capacitor related? and were correctly soldering capacitor? a scheme or diagram to understand if you can, thanks for sharing
Thanks. I did the same thing on my Acer tab. Only no capacitors. Just connected the battery to board harness wires to the external power supply. Working fine now for almost a year.
That's great... this one was not happy that way... 🤷♂️
Thank you for watching and for your comment!
Hi Jake, can you tell me some details about the power supply you chose to use? Did you connect the cables to the battery board?
@@claudiofiero8523 Hey Claudio. I chose a DC power supply that matches the battery input voltage. My sensor has 2 AA batteries in series (head to tail in the compartment) producing 3 volts. I went on eBay and found a 3v 1amp DC power supply(sensor has low current draw
@@claudiofiero8523 sorry you are asking about the tablet fix. I soldered a short micro usb cord with the male end cut off. Opened up the tablet, drilled a small hole in the back and soldered to where the red and black internal battery wires connect to the board. This bypassed the charging port and the battery charge indicator on the tablet. The overcharge circuit in the battery itself prevents overcharging for my tablet. I used epoxy to stick the female end to the back of the tablet. Then you just connect the normal power supply/charger to the female end. Works great. Saved me tossing out the tablet since no one would fix/replace the broken tablet port on this Acer. Too intricate and costly.
Perfect solution for a permanent tablet mate great work ... 👍👍👍 BTW Happy Birthday you old git 😊 I hope you have a great day 👍👍🎂🍻
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Thanks!
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it's his birthday, he kept that quiet .. we could have had an online party and a cake with a candle on
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just did this on my tablet with no capacitors turned on for a second then turns off, what capacitors did you use ?
Do you think I can achieve this with the t580 (samsung tab 6)? Im planning to do this mine if it can be achieved. Thanks. Im planning to supply directly with dc dc transformer from 12V to 3.7V (around 4A if its enough)
what is the capacitance of the capacitor used?
i would like do this to ASUS Transformer TF300 .
Thanks for this great job.from morroco.
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Thanks for the video! Could you please share the precise type of the tablet? This hack unfortunately does not work with my Lenovo Tab 4, its power management is clever as hell, probably counting coulombs or something, can't get it to work no matter what :(
What power supply did you use? Would it work on a quick charge one?
Li ion batteries only last for a limited time. I changed one some months ago for a slightly bigger one in a gps and recently I have used a new type of 9 volt Li ion battery which is a rechargeable and will source 600mA...ideal for a miniature gps which I built...expensive but it does the job...probably ideal for radio mics and remote sensors.
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In this case I just need it on at all times... the battery is really not needed...
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@@LMAutoRepairs great video, would you be kind enough to give me the capacitor voltage and uf details 😁👍
I have 12.9" ipad pro 1st gen ipad pro ... its battery lasts only 7 hrs in use.... I was thinking if one can develop a battery with higher mAh value for this ipad ... especially that when I open the device I noticed that Apple could have put a bigger battery because they put metal objects above the battery just to fill the space ...
Btw I loved the way of explanation..😍
what capacitors do you use?
so if I replace my battery with capacitors and charge it it should work?
Does anyone know what are the blue cables on battery for? temp sens?
yes that's a good reminder that we can smooth out supply with the caps, what size caps did you use?
That's true... and a good question...
Used whatever fitted inside...😋
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Can u tell wich capacitor can i use for this?
V?? / Microfarad??
why the capacitors? can you tell me about that? if your power supply is sending the correct power.
hi, cant u just solder the red and black (power) cable to the mainbard (where you measure the voltage at 4:01) 2 black and 2 red (ignore blue) connections? does it have to be with the battery ciruitboard and capacitors?
Some tablets will run OK like that... some others not really...
Thank you for watching!
Nice repair video
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Couldn't piercing the battery allow moisture to contact lithium? I'm glad it didn't start a fire!
Thank you for this capacitor-to-BMS idea! I copied your approach to keep my old phone running with no battery - I got a cheap 2.7V 500F super capacitor and a voltage regulator to keep 4V going to the BMS, so it thinks it's mostly charged. It works nicely, as long as I don't let the capacitor drain (this could trip the "permanent shutdown" circuit in the BMS that's designed to prevent damage when the battery dies)
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Can you please share the Schematic diagram, I am unable to reproduce the same
elo.. my tablet 7.4v two batery ... what the voltage capasitor bro to I install ??? my tablet china very² old.. input power 9v charger
i cut out the original tablet battery and took a 3.5 volt flashlight battery and soldered it to the internal battery connections. the unit powered up and it runs just fine. the screen runs 24/7 for security cameras. the flashlight battery is setting on the table next to the tablet. you need the batteries plus and circuit board. just cut the battery off and solder to those tabs. watch for correct polarity. my table battery app show a lower power but it is working like a champ. for 3$ i fixed mine maybe you can do it to. you will just have a battery to tape to the back of the tablet. my guess is you can use a cheaper phone battery as well and them put it back inside.
i just now swapped out the flashlight battery for an old phone battery and taped it to the back of the tablet. i will not put the back n it until i prove that this will work. if it does then the tablet is again portible. i see it is charging on the usb plug. i took pictures of the process if any interest. we will figure out how to connect. i may put them online if i figure that out.
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My one is always on the wall... so the battery is not needed... the reason why i did it like this...
Thank you for watching and for your comment!
@@LMAutoRepairs thanks but most do not have that power supply but they do have the original charger and they have old phone batteries. so all they have to do is remove the tablet battery and solder in place of the tablet battery is a old phone battery. they just have to leave the circuit board in the tablet. thanks for your post that inspired my hack.
The power supply i use when the tablet is on the wall, is just the original charger... removed the usb plug at the end, and connected it straight...
No special power supply...
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Hi there, looking to do the same thing as you. Could I please ask what kid of capacitors you used? Also this is the tab 3 10.1 right? Hoping it is the same as mine before I do this. Definitely looks it. Thank you, great video!
Wow, you would think he would be kind enough to answer your question. 🙄
hello , did it work for you , i need some help with the same tablet
I have an 3 old Asus Transformer TF300T tablets from 2012 and simply unplugged the pin connector to the battery, electrical taped over the plug just to be safe, and resealed the case. It has been working just fine off of it's original charger. And I have 3 of them all fine this way.
I wanted to ask though. All this with capacitors and voltage... is mine working so simply due to it being a decade old, or could it be dangerous or do damage at all. I never ever use it without me being right there with it and always unplug it as soon as I've finished. It seems fine, but I don't know if to say that the older models simply disconnect the battery and all is fine through the original charger, or if that advice is very bad.
All I know is that for me it works fine and has been a few months working perfectly, but I am no electrician.
Great video, but if I had a newer tablet (not so simple as unplugging the connector) I wouldn't try this, not got the guts to, but wonderful guide for those that can do basic electronic work! Brilliant!
Old tablets can be different...
Yes, some you can just unplug the battery and connect the power supply...
Thank you for watching and for your comment!
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Curious about that hardware hack for yours. What was the Input Voltage that you used directly to the capacitor?
5 v...
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I did this on a tablet that had 2 battery's doing 12 volts and the power supply to it is 12 volts. So just solder the + and - to where the battery wires went. But there is a 3rd wire I guess the BMS wire. This will not stay up for more then 2 days and turns off. What can I do with the BMS wire? How do I wire it up and were? So it will stay one as long as the power supply has power.
It would be good if you take your tablet off the wall to read what the numbers are on the capacitors.
How many microfarad and volt you use?
Very nice idea ser.. I have a Asus t100 here but I didn't use because of battery. But the battery is have 8 wires 3 red. 3black and green, blue. How can I try ur idea ser..
Surely...
Just check connections etc...
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What voltage is the capacitor?
How do this way in car scanners
Hi! I have a Samsung Nexus 10 tablet. I already opened it up and took off the Battery Protection circuit (bpc) from it. It looks exactly the same as yours. It has B1+, B1- and B2+, B2-. Where exactly on the bpc did you connect the positive and the negative wires going to your power supply? I still want portability so I plan to just use a powerbank as a power source and stick it to the back of my tablet so it can still be portable. Thank you!
If I recall correctly, I jumped the B+ and B- and connected to power to them...
Did it ages ago... lol
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Hi again. Just to be super clear, is this how you did it? Connected capacitors or Battery1 and Battery2. Then connected the (+) terminal of Battery1 to the (+) terminal of the external power source AND connected the (-) terminal of the Battery2 to the (-) terminal of the external power source?
What capacitor did you install?
How would you connect a usb c cable and not get backflow?
Hi, thanks for sharing this very interesting solution. I have the same tablet you are using in the video and the trick worked fine. One thing to mention is that I had to use a 3A USB charger otherwise it wouldn't boot. QUESTION: I noticed that the battery percentage drops from 100% to zero within a couple of days and the tablet switches off and need manual power on. Do you have the same behaviour? How did you solve it?
Hi
No... I mean, I ended up connecting a more powerful power supply... in my case a 4 amp...
But my one stays on... unless is the 1 amp difference from my power supply to yours...
Another thing worth mentioning, is that sometimes different hardware and/or software can make the behaviour to change...
Thank you for watching and for your comment!
Can you let us know how we can do it with Samsung Galaxy A11?
What size capacitors.
Brilliant. I am trying to do this to all my tablets in the house. I have Samsung Galaxy Tab A T280 with a Battery of 4000mAh. I took on the battery out and connected a supercapacitor 5V 5.0F but it is not working (plus to plus and minus to minus). Any idea why?
probably the discharge current is high and bms detects that and shuts off the output.
@@viks599 Should I add a resistor after the capacitor or choose a smaller capacitor?
@@DrCostinMarinescu i think in video above he has added capacitor and a 5v or 3.7v dc power supply in parallel. if you can figure out the the charging circuit on mobile then it is just about adding some jumper wires hopefully.
Does anyone know someone who can do it for me? I have about 10 Samsung tablets that I want to convert into running only on the charger.
Nintendo Switch it's also possible to rebuild?
kind regard
pls send me the chart , how to wire those capacitors
What is that thing you used for testing called? I'm really curious. I know the brand is UNI-T.
Hi
It is a scope and multimeter...
Thank you for watching!
@@LMAutoRepairs I see. Thanks for the vid! ♥
Hello I Have The Same Tablet With The Same Problem !!!......Can I have some help here , the battery & Battery connector is no longer available with me ...i'd thrown it all away because of swelling !! i need some help ??
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I have old tablet I can’t open it with power button charging doesn’t so imma give this a try to make as second monitor for pc
Excellent solving for permanent
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Pc users be like : hey.....
A Worthy opponent
Our battle will be legendary
the tablet is working now without battery but every time i want to play a game .... it turn off ..... any solution ???
Excellent demonstration! Can DC power supply bench use to charge phone battery directly from its micro usb port, via a micro Usb male connector to banana clip test leads ?
Yes it certainly can.
I have the same tablet and I want to do the same thing, how many volts and how many amps did you give to him and which capacitors did you use? Please answer
5v 2A
I can't remember the capacitors...
Thank you for watching!
@@LMAutoRepairs oh thank you very much
i tried that and my tablet would not run on just the charger i had to wire in a 3.5 volt torchlight battery to it. so now i want to get a phone to run without the battery have you done that? i use an old phone as a monitor for may cameras at the front door and i have had no luck getting a phone to run with out the battery
No... I never done it on a phone...
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J'ai essayer de comprendre mais est ce qu'il y aurait quelqu'un qui pourrait me dire la valeur du condensateur à mettre. Y a t'il un calcul qui permet de le savoir car la dans l'état je suis content que cette personne à reussi à le faire mais sans information ....J'ai une tablette Samsung SM-T320 .merci
Hi I am trying from months to turn on my tablet. I did same as process as you. But when it boots after logo it shutdowns again. Please help out!!
What capacitor do you use?
What charger do you use?
@@laviiai2 5v and 3.7v charger
what make is that massive multimeter and where do i get one?
It is a multimeter and oscilloscope...
From Uni-T...
Check they website...
I bought it years ago on ebay...
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hi can you make galaxy s8 ultra like this?
My name is sandra ì all ways keep my tablet plugged in all the time. Can it be removed from my Samsung tablet 4
Hej Nice video
Thanks!
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hello What is the Farads of the capacitors ?
In basic terms, is the amount of charge it can hold...
A quick google search, and you find way more detailed information about it...
Thank you for watching and for your comment!
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Hello and thanks , but my question is : what are the the number ( microfarads ) did You use to repair Your tablet ?
@@rolandmouton1697
Pass... don't remember now...
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would it be possible to power the unit through the USB port with this kind of setup?
I would say yes...
@@LMAutoRepairs Ok I will give it a go. I was just trying to remove the battery pack from the plastic and I think I might have cut into the cell. It is now having a rest on the concrete outside :D
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Why do the shots at the end show a full battery?…
luv it 👍👍
Thanks!
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How to do that solution toa Onno Tablet from Walmart
volts and capacitance of the capacitor used????
Anything that fits... lol
I used the highest capacity I had that fitted...
Can't remember now what it was...
Thank you for watching!
Once again... Could you ALSO be focused and oriented on the essentials, please?! Meaning, the value of the capacitors, the wiring, the power values of the DC supply,... You know, THE DIAGRAM, schematics... And we could then also comment you for your achievement and contribution to society. The full monty event...
you waste time and didit inform that capisitor installation and his value, the main part is missing,
I connected 4.2v from the board directly to the battery terminal but the tablet (samsung t310) wont boot. I see battery charging animation. Maybe 5v from the usb plug will work.
What to connect to the yellow wires?
Something different i love it!
Excited to see more of these..
As always keep up the great work!
Happy Birthday 🎂 🎉 🎈
Hope you have an amazing day
Thanks...
There is more coming...😉
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The funny thing is you said the video is nothing to do with cars. I am watching it to figure out how to install my tablet in my dash to run my instrument gauges without needing to charge the tablet through the USB port (the port is needed for data transfer from the car's ecu). So it is actually a video to do with cars. Lol.
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my question...
how the hell phone charger work?? i know its not like laptop...
how high voltage you give to thta tiny board one the battery pack?? 4.2V??
why do you need capacitor?? does your power supply already have it?
and if i use phone like that for game , can it turn of because drop voltage from heavy use?
sorry english not my main language but i interested, my phone already eat 3 battery because game...
I put the capacitor just to ensure better voltage stability...
This table have very little use, or not heavy use I would say...
Not sure how would behave during heavy tasting...
You can try that yourself I guess...
Thank you for watching!
Bloody hell and I thought my bench was messy 😂😂
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That should work with the right capacitators . Do you still have them installed ? And I just see you have your Birthday . The question is , 14th of January or the 3rd of December ? Anyway , if it is the 3rd of December than happy Birthday and buy yourself a nice gift .
Yes... I still have them installed and running OK...
Today, 3rd of December...😊
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@@LMAutoRepairs Happy birthdayyyyyyy
Thanks!
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@@LMAutoRepairs Happy birthday !!!
Thanks!
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1st view 1st comment,,, Good work
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Thanks!
nice
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Thanks!
most androids i attempt to make zombies out of only check for battery at boot so as long as you make it think theres a good battery and your device is high enough wattage you wont need a battery that holds charge for complete device function
Plz do it with Samsung galaxy tab 4
Regarding those 6 wire bat connector: 2xred blue/green 2xblack does any one know the pinout?
I believe the green is a temp sensor to keep the battery from over heating while charging. Red should be Power + and black Power -.
My tablet test the capacitor and determines the battery needs to charge, then turns off. .. :)
So you add a video just to show us that you did it? Any information about capacitor type or how you connected. Im happy i lost time watching how you remove the battery but any useless information.
wait, you speak Portuguese? I don't :P
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Yes...
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how you connect capacitors. you have not explained. so seeing this video goes in vain.
Well... there is only one way to connect capacitors...
Positive to Positive, negative to negative...
Thank you for watching!
Capasitor spec please
@@LMAutoRepairs Are they connected from B1+ to B2+ and from B1- to B2-?
A capacitor is like a small battery...
So, the positive pin of the capacitor goes to the positive connection, and the negative to the negative...
Hope it makes sense...
Thank you for watching!
@@LMAutoRepairs So B1+ to B1- and B2+ to B2- then?
now your house is much safer, that battery would catch fire sooner or later.
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and when he poked a hole in the battery, that could have been disastrous! NEVER poke holes in LiPo batteries!!!!
I didn't poke a hole through...
Not that incoscient... I just peirce the outer plastic wrap... 😋
Anyway, thank you for watching and for your comment!
You taking to much
I never asked you to watch...
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You dont realy explain on the video. You said that it is january 23 that is irrelevant but do not explain well the solution. Thanks anyway
It worked for me...
Thanks anyway...
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