Dumpster Li-ion vacuum cleaner
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- čas přidán 2. 02. 2024
- Analyzing a cordless Li-ion vacuum cleaner from a dumpster. What's inside and how does it work? What failed in it, why it was scrapped? Could it be fixed? If not, what useful components could be salvaged? Rowenta Air Force Extreme Vision Pro with a rechargeable 25.2V 2000mAh Li-ion battery pack made by LG Chem.
The battery pack teardown and capacity test:
• LG Chem battery pack d...
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" in the bathroom, or maybe the other way today..." 😹😹😹
What, do women not shave or something? This ridged gender stuff is bullshit.
The channel owner is a certified chad 💯
Where the HELL is my comment? Damn CZcams!
😂 "...or maybe the other way today..?" 🤣👍 Sharp observations at every level, I approve.
"The video is getting bloody long" honestly near the end i was sad it was coming to and end, i really enjoy your content that even if you where to upload a 2 hour video i wouldn't hesitate to sit through it all, i definitely wouldn't mind if you uploaded more often :)
Vacuum cleaners. The appliance we throw away because they DON'T suck! So sad.
You rock!
Can't believe Microsoft still hasn't gotten into this business.
that 65 minutes is marketing math !... 25 minutes on high setting + 40 minutes on low setting gives you the 65 minutes 🤣🤣
In their defense it's 40 minutes on low setting when the unit is taken apart and the impeller is in free air. When the airflow is restricted (such as by the filter, etc) the current will go down. Also as the battery voltage falls the current will also fall. I'd say the advertised 65 minutes is plausible.
@@eDoc2020 isn't it the contrary ? if the airflow is restricted the motor will draw more current to compensate ?
@@bobjohn4086 It's not really intuitive but no. With a centrifugal pump power consumption goes down then the flow is restricted. When using a vacuum cleaner you can hear the motor speed up when you block the hose.
@@eDoc2020 wow I've never think about it like that, I always though this noise meant that the motor was "forcing". so if I understand well, when you block the hose, the motor turns at full speed because it has no load, no air is going in or out of the volume where the fans are. but when you let air be sucked into the tube, the aerolic system creates a suction and therefore the motor has a load
@@bobjohn4086 Pretty much. I even did some tests when replacing my furnace blower motor. When closing all the ducts the power usage went down to 70%. Due to inefficiencies and internal drag the load won't be zero when blocked. A vacuum cleaner motor also has a dedicated cooling fan to ensure it doesn't overheat. This fan also has another "secret" function: its mechanical load on the motor limits the max speed. A truly unloaded series wound motor is prone to revving itself to destruction.
Very interesting. Just shows how "ordinary people" have no idea about electronics.!
keep up the good work. Love the pets BTW.
As a life long vacuum cleaner enthusiast I 100% agree with you on corded.
I much rather a high quality corded and bagged vacuum than this disposable bagless cordless junk.
Cheap low quality corded is also better than 90% of cordless
Bags are a horrible impractical thing
@@erminbajric4633 Oh yeah, because having to deal with dumping out all the dirt and other nasty shit out of the vacuum cleaner is so much more convenient than a paper bag that you just take out, throw away and put in a new one. Also bagless suffer from turbine/motor damage way more often. Also bagless means inhaling and spreading fuck ton of dust in the house every time you empty it out, because agitating it just a little puffs up a cloud of dust that you just vacuumed for it to settle on the surfaces AGAIN. Bagless is shit.
@@erminbajric4633Bagless is way worse. I had one of those ONCE. Never again.
@@Bananovskyyy do it outside, not that big of a deal
Cordless vacuum cleaners rely on the rotating brush head to make up for the lack of suction power (compared to mains powered vacuums). Without an operating power head, this cleaner would have been quite ineffective, even on hard floors. That is probably the reason they threw it away.
For many a decade, the rotating brushroll design was a (and still is) a staple of upright vacuum cleaners, as traditionally they were agitating the carpeting (think Hoover's old slogan, "It beats as it sweeps as it cleans") to dislodge dirt and debris from the carpets which was then pulled up by the airflow, and in the process also helped to comb the carpet to make it look nice, straight-suction vacuums though with no rotating brushes are not as effective on carpeted surfaces, meaning you don't get as clean a carpet as you would if you had used a decent vac with a brushroll...
That is why I try to move the suction head on the carpet :) It does have a brush strip built in - so kind of the same effect 😅
So you're saying they threw it away because it sucked, which sucks, since it would suck less if it sucked more?
Usually you can get replacement brushes. But this thing is kind of a heap so probably not worth it.
@@twocvbloke I've seen many a Hoover Junior field-stripped! This was a very popular upright vacuum cleaner in the last century, with a motor of about 400W (judging by size). The brush roller was driven by a round-section rubber belt from a spindle on the end of the motor armature, which was designed to slip (with a characteristic burning rubber smell) if something blocked it from rotating; an identical belt was used to hold the inner paper dust bag onto the pipe spigot. And the exhaust air was quite cool.
Many people in the UK complained about the EU limit on vacuum cleaner power ratings; but the fact was, manufacturers were gaming the system by using cheaply-made, inefficient motors which generated a lot of waste heat to claim inflated wattages. 1000W of kinetic energy actually usable for cleaning and 1000W wasted heat allows you to plaster "2000W" all over it in huge text, but it will not clean as well as 1200W of cleaning and 300W of heat. And the exhaust air from these cheap and nasty cleaners was always red-hot. Using more copper in the windings and more steel in the core would have reduced the losses, but would have increased the price of the machine; so they pretended a bigger wattage was a positive thing, and the ignorant customers wound up paying more every time they vacuumed their carpets.
Nothing is better than old vacuum cleaners with a huge barrel capable of vacuuming an entire country
Old reliable unit and not dodgy "modern" ones
Or broom😂
There is a bed bug at 10:34 near the ribbed part. You really have to inspect trash picked items carefully.
Fortunately his batteries are also long at 0% :)
It might be a good idea to decontaminate the area where you took the cleaner apart, in case of larva or eggs@@DiodeGoneWild
Completely agree with you and your cat. Batteries when a wall socket is within a few meters? Crazy.
What about robot vacum cleaners?
@@znoop72What about them ?????🤔🤔
Dragging the cord around vacuuming does kinda suck. But I bet this cordless vacuum was only a fraction the power of a corded model. It certainly has more points of failure too. So that convenience comes at a heavy price.
I interpreted the cat's comment as a remark on him using a battery powered screwdriver lol, to show the irony
Commercial cleaning crews often use backpack-style cordless vacuums, especially for stairs. It eliminates the trip hazard (for third parties) of having a cord snake down the stairs, and having to go up and down stairs repeatedly to unplug and replug the cord.
Love the process of troubleshooting this vacuum. The use of his tools down to the questions asked at critical points.
I had a similar situation where I got a free lithium ion vacuum that was missing important parts. I took out the board, motor, and battery and used duct tape to attach a plastic funnel to the blower side of the motor. It made a pretty nice high pressure blower for cleaning electronics. It looks sketchy, but works great.
The pad in the handle, these things get quite the static charge, but as a bonus they use your body to absorb transients to pass a noise test? 😂
I’ve picked up plenty of mains powered vacuums dumped by the roadside. I’ve also even picked up a Vax carpet cleaner. The only problem was the heavily clogged filters. People would dump them assuming they’re faulty.
My aunt once had problems with her Kirby not having any suction. I turned it over and found the entire suction nozzle area, from the beater brush all the way to where it attached to the motor, was completely packed full of crud. Literally you couldn’t even see the beater brush, it was completely embedded in a solid cake of dust and hair. Wtf…
I cleaned it out and replaced the snapped beater brush belt, and of course it then worked like new. I wonder how many times she “vacuumed” the carpet without realizing it was not doing anything at all.
I can watch your videos all day long, never too bloody long. Thank you. 😉👍
i could watch you old day every day. brilliant
My father bought a Kirby 25 years ago. He used it daily. I still use it daily. Someone 25 years from now will be using it. My washer and dryer are even older Maytags.
Got a Miele from 20 years back.. Not quite daily use, but of course works perfectly to this day. The model from today is not much different but half the power of the old! 800W instead of 1600W!
Fantastic video, with laugh-out-loud-funny bonus content. Priceless entertainment. Your videos are never too long.
The cat at 2:50 definitely won this episode 🤣
It's interesting that the PWM frequency is quite low, just 560 Hz in this case. Maybe they wanted to minimize the switching losses in the mosfet?
The PWM sounds awesome !!!
Makes sense because the FET has no heatsink on it
It makes me glad I have a stock of traditional vacuum cleaners (oldest one being somewhere around 1967 to 1970, which is the one in my profile pic, a Kirby Dual Sanitronic 80, which I need a stepdown transformer to use, it being a US-only vac with a 120v motor!), these modern screamers, battery or mains powered, are about as effective at cleaning as a broom with no bristles... :P
You had me at "bloody vacuum cleaner". That HAS to be worth a beer on me 🤣
Thanks :)
I got one of these cordless vacuum cleaners from Lidl with lots of blue LED indicators and white lights; that model had a stand where it charged the batteries. I never was curious about the charging circuit and because it had a small power brick that went into the wall, I assumed that the entire charging ang balancing circuit was inside the cleaner or in the battery. Now it makes sense to have a small power adapter for few hundreds of mA.
However, I did not used it too much (maybe 2-3 times at most), I like better my older one, powered from the wall so I gave the cordless one to my sister, as a present with all the accessories and manuals in the box, like new. Few months later, she also gave it as a present; she does not liked it either...
It was probably thrown out because something happened to the brush part in the head, since it's missing. Perhaps they broke it while trying to untangle hair or something from it. EDIT: Looks like you found the problem with the brush motor, which would definitely explain why the brush was missing if that's what was broken.
When the wire broke powering the agitator brush motor the brush wouldn't spin anymore. So the owner took it out because it wasn't turning anyways. They probably tried to fix it and when they couldn't they just didn't put it back.
Yup. Putting batteries in stuff that could plug in to AC power just a few feet away is ridiculous for multiple reasons. Not only is it wasteful to mine and create batteries for devices that could simply run from AC, but it's also a boon to brands and stores because battery-powered devices *always* wear out sooner than AC-powered devices. This is made worse because brands don't allow batteries to be replaced in many devices.
I agree with DiodeGoneWild's position same with yours to still like cables in priority of purpose of use. Nowadays it has become fashioned to have every electronic device designed cordless. From an environmental point of view it's a disaster to say that the copper for a let's say 10 metre mains cable is hard to mine whereas Lithium as rare earth element for the battery pack on the other hand is way more hard to mine in reality! And you are absolutely right about wearing out: If not caring about Lithium batteries they soon die after few years if you do not charge them from time to time! But at 20:24 I am little bit of critisism with his argument because some women or men use to shave wet on body, therefor it's good to have shavers designed cordless not to get an electric shock from mains socket.
I'm glad I stayed to watch this video. It was more interesting than I thought it was going to be.
Lucky find on the battery pack.
Next thing you will find on that dumpster will be a Braun device next to a charger for a battery powered vacuum cleaner 😂
I have two cordless vacuum cleaners. Both are restored from trash. For regular floor are just enough, but not for carpet. They're even good for cleaning inside a car or camping.
Electric shavers now are powered by batteries because they could be used in wet environment, eg. with shaving cream and could be totally submerged in water. Noone will gave you a guarantee to not beeing shocked when you will use shaver in water even via proper insulated power adaptor.
All my power tools are AC except 2 Makita 12V Nickel-Cadmium battery drills. Why I have 2 drills? The ni-cads died on the first drill and to get two new ones it was cheaper to buy another drill with two new batteries in a case with a charger. Crazy! The dog makes a rare appearance.
Unlike your NiCd drills, modern Li-Ion power tools have plenty of power and they last 4x as long as NiCd. You do have to learn to proclivities of Li-ion though. They *hate* to be charged while hot, or discharged to empty. I haven't needed a corded drill in years, and I use drills & drivers all the time. Battery powered is just WAY more convenient.
Like, you're up in a 110 degree attic working on an AC air handler. Might not be a plug. Why waste the time & effort using a manual screw driver?
That said, battery powered sweepers are for picking up crumbs, not vacuuming a carpet.
Great video, on what to check for if someone has this type of vacuum if it's not working. Keep doing what your doing, I love it. 😊
Good find. I always look out for small vacuum cleaners at the side of the road, hoping that they will be cordless, so I can get the battery packs. But usually they are mains powered small vacuum cleaners that someone has cut the cord off.
well that is a cordless vacuum they didnt say it would work
Loved the video! It doesn’t surprise me that someone would throw this out, people would rather buy a new one than fix what they have. When I was a teenager, my grandfather and I would pick up vacuum cleaners from the trash and repair them. 90% of the time they were thrown out because of dirty filters or clogged hoses. We would repair, clean, and resell them for $10-$25 to people who couldn’t afford new ones.
i love your BLOODY LONG videos
Love those additional worldview coments xD and totally agree on them!
Just the average chad grindset
I got 4 second-hand but almost like new Parkside (a Lidl brand) PNS-300 mains powered screwdriver drills, those are basically a normal cordless drill but with a 230V motor and a nice 5 meter power cord.
Their power is only 300W but since they have a gearbox with 2 speeds and the chuck capacity is only 10 mm (3/8") they can actually be used to drill.
The chuck can also be removed by pulling a collar and then the shaft has a hole for the common 6.35 mm (1/4") hexagonal bits.
Brilliant as always 😂
Great video, really interesting content, thoroughly enjoyable .
Cordless is nice for quick clean-up jobs where whipping out the cord often takes longer than the cleaning does. The cost vs convenience balance is horrible though.
Ešte toto video som si akosi pozabudol pozrieť, tak som to teraz napravil :) a ako som už raz povedal, tvoje videá (a vôbec videá všetkých youtuberov, ktorých sledujem) môžu byť kľudne aj dlhé a aj tak si ich rád pozriem.
Thank you, keep working.
Battery powered vacuum cleaners are just made to be thrown away, especially those that are also supposed to be used to clean the floor (as opposed to the smaller hand held ones). People either leave them in the charging station all the time, which destroys the li-ion cells in a year or two (they lose capacity faster the longer and closer they are to a fully charged level). Or people almost never use them and find the batteries fully self-discharged and again damaged.
As for manufacturers: the worst offender I got (I repair things for people) was from *Bosch* (a Bosch Athlet 32.4V). If a single cell of the 9S pack drops below 3.0V, the electronic board bricks itself! Even if you charge the cells (via the balancing connector of the battery pack for example) or replace them with new ones, the vacuum will not work again, but always indicate a battery fault.
Thanks for the video! I appreciate it :-)
We live in such a disposable society. Planned obsolescence has done so much damage to the economy and environment.
Planned obsolescence helps the economy. It keeps consumption high. I owe, I owe, so it's off to work I go!
It's getting even worse now that fluorescent lamps were banned in the EU in 2023 and now most cheap chinese fixtures have integrated, potted non-repairable and non-replacable LEDs. Even with mercury in fluorescent lamps, I doubt that importing LEDs from china instead of producing fluorescent lamps locally in Europe is any better for the environment.
Great random video!
Free lithium power pack! ❤️
Portable battery operable vacuums are good for just the floor & long corridors and a car.
I own a mains vacuum(in old aps) and a stick one. Mains vacuum is great for carpets, but in my flat there are no carpets, only vinyl floor, no need for high suction power(that missing brush is actually useful, has quite a lot of torque)
The only thing surprises me is human dumbness, if my vac dies I'll replace batteries, transistors, and it will work.
Things are even funkier now. I have a self-operating humanless UFO shaped vacuum and the day it stops working the thing that needs replacement is most likely the software inside of it...
The amount of videos this man uploads per month is extordinary looking at the views
Actually, in the UK (where the Neutral is earthed, so you can get a shock from touching just the Live wire), **no** power sockets are allowed in bathrooms except a shaver socket with an integral isolating transformer using a split-bobbin construction to minimise capacitive coupling to Earth, so you cannot get a shock from touching just one wire. This is quite low power, but OK for recharging a cordless toothbrush or shaver and should last long enough to get a shave even with an ancient shaver before the thermal cutout operates. A switch on the primary side is operated by inserting the plug of the shaver. As there is a transformer, there are usually two outlets for 110V and 230V. Hair drying has to be done in some other room (I don't think anyone ever made a hair dryer with a battery motor and a butane gas canister for heating; or maybe they did, but it just never caught on). Also in the UK, bathroom light switches must be operated by a pull cord, or be outside the bathroom.
Here, we mostly have bathroom light switches also at the outside of the bathroom, but in my appartment they put them inside. And there are wall sockets in the bathroom. Normal ones, no isolation transformer. In my mother's old appartment, the socket is above the bathtub! In new bathrooms, the sockets just have to be a certain distance from the bathtub or shower.
@@DiodeGoneWild You wouldn't really want a power socket with a built-in isolation transformer of c. 1.5kVA rating for a hair dryer!
UK laws in general are pretty paranoid about safety, but I guess every thing you are not allowed to do represents a way someone died horribly. Where I live is a former coal-mining area, and there are still just some people alive today who remember exactly why some of those laws are on the books.
Almost all European countries allow sockets in bathrooms. They have to be on RCD but there are many older installations from the 1980s or ealier without RCD and people are fine, they don't keep constantly dying from it. Also, in Central and Eastern European countries, aluminium wiring, usually 2.5 mm2 was commonly used until the early 1990s. Many houses are still like that, not renovated and just fine. In 1960s and older houses that were not renovated you can also find cloth and rubber insulated wires.
Actually, this is a bit of a myth. The regulations regarding the use of electricity in bathrooms in the UK are complicated but in essence they boil down to the fact that you cannot put outlets or wall switches within 0.6m of a bath or shower which is similar to the rest of Europe. RCDs are compulsory for all circuits now. It's a bit of a silly rule because it doesn't stop you using a hair dryer in the bath or having a fan heater next to the shower.
UK electric laws are extremely good. I bet there's a lot of bureaucracy behind of it, it's better to keep natural selection working against dumb people and having the ability to fix own outlets and wiring for handymen
Your cat was right: Use a mains powered screwdriver or armstrong. John Dyson made too many millions with colorful suckers, both plugin and battery. Dissection of its head revealed the beast of the former owner. My son tried a small robot vacuum with 2 cats in the house, not enough hair capacity. Now they use 2 stick battery suckers. When I bought my first Commodore 64 I could never imagine that one day batteries can keep me computing for days.
I discovered when woodworking how much torque an old-fashioned bit brace can deliver. You can buy adapters that let it handle socket wrenches or screwdriver bits.
You almost have to buy an antique one, though…
I love his humor 😂
It's an annoying world and the smart ones suffer every day.
I really enjoy watching DiodeGoneWild passively judge the entire world by the new standards that are complete nonsense. I too till this day do not understand, when appliances started to become "better" when you install a battery inside of it. when in reality the battery makes the appliance a total piece of trash. A vacuum cleaner is one device that should have never been made cordless. Also the mini rant with the shaver power supply was really fun and on point regarding today. I don't know what has the world come to, but it makes me very concerned.
I'm glad that some of us are still sane ;)
Thanks!
Thanks for your support ;)
I replaced the batteries in my cordless vac from an old laptop. It's now worked longer than the original batteries.
You have a pretty cat! more kitty!
Thanks
Thank you for your support ;)
Danke!
thank you for your support ;)
Am reparat asa ceva ,bateriile in timp cedeaza,cele cumparate desi scriau pe ele 1,2/3,8Ah(14×50mm) noi fiind erau slabe si la teste doar 1Ah max.Asa ca al atasat baterii 18650 pe exterior ca sail mai pot folosi,bucsile trebuiesc neaparat unse ,pe cel dinspre turbina trebuie sa faci neapărat gaura ca sa poti trece un tub flexibil subtire 2mm ce ajunge la bucsa.Cu multa rabdare reușii .
A small cordless vacuum can be useful for picking up crumbs etc but for general house cleaning a mains powered one wins every time.
I wouldn't be surprised if it was trashed due to it being dirty, I've personally seem vacuums trashed because the filter was dirty
Crazy world we live in.
This vacuum had two faults. They had the wrong charger and that wire was broken to the head.
Looks like some kind of sea monster.
When things get messy, call for Nessie.😏🇬🇧
@@brucepickess8097 Nessie don't need no dirt bag!
The dumbest design I've seen for a vacuum cleaner head was from a commercial vacuum cleaner designed and made in Italy. The 36V cordless head and 240V mains head were identical, except for a sticker indicating the 36V one was for a cordless stick. I don't know how many have been blown up.
Like, the same connector, in the same place, without any kind of keying? Lunacy!
For me a battery powered vacuum cleaner is a psychological thing. I simply use it much more often because it is so convenient to just pick it up. It does not clean as well as my mains-powered one, of course, but I procrastinate on using the big one because I have to carry it upstairs and downstairs and such.
I suppose a smaller corded one would also work, if such a thing were made.
Hey that's interesting. I also once found a vacuum cleaner next to a dumpster, but like 1 year ago (but a small battery powered one for cleaning a car). But I also found it without the charger. And so I did try powering and charging it, and other than that it worked, charging it (using a separate power supply), I found out it also pulled as much current as possible from the power source to charge it even though it was rated 300mA charging current. So it also relied on the separate charger to limit the current. And now that got me thinking, I found mine without a charger and so did you (at least not a compatible one lol).. So could it be possible that the chargers also end up breaking, maybe because of some cheap current limiting circuit? Just a thought.
I guess the charger is either just a normal flyback power supply relying on the primary current limitation, or maybe it has some secondary side current sensing, going into the optocoupler besides the voltage feedback. But I've never seen one personally.
They can actually recycle lithium cells. In fact they're almost completely recyclable, certainly the lithium, nickel, cobalt, manganese, etc. are.
Make a video about your diy 60v 40amp power supply, it sounds interesting.
I just repaired one similar but harder to open. Turned out one of the wires had come off the main motor due to vibration. They were just soldered on with nothing like heatshrink re-enforcing the connection.and wire.
You maybe could use the parts to make a (rather noisy) solder fume extractor?
The high motor current is actually because of age. If you buy the same type of motor new the current will be lower. Idk why or if I may be wrong
Well, It might be possible if the windings have short turns or if the bearings are failing.
had a vax cordless that lasted just past the warranty till the motor died. i harvested the battery pack and added a bms board. it now powers my bicycle lights
Battery powered ones are good for the car. Depending on the house, there's not always a power socket nearby.
LOL at all those buzzwords. It just needs some flame stickers, too.
I have this same Rowenta but it is 10+ years old. It works perfectly but each time I turn it on, it smells so horribly that I no longer use it. Maybe I should open the impeller and see what horror is in there.
Can you show us..how to make the vacuum work without batt..from mainz ( using laptop adaptor? ) cheers
Cant wait to see the battery guts
You got a nice battery pack there now man. What you gunna do with it?
2:49 LOL That cat is right.
dude you're so amazing and also funny you make me burst out laughing like crazy ( 20:42 .. or maybe the other way today..🤣🤣🤣😂😂....continue👍👍👏👏
even more saaaalt!
I also prefer wall sockets. I cut every wire from my girlfiends christmas lights to power them at least from 5v USB. I think every household has at least 10 of them hidden in all the drawers.
Well, the battery. Maybe handy for something, maybe the small motor, but certainly the screws..
We are all a little crazy
So, does it have a brushless brush?
3:38 - seems it does. Albeit in a different way than I thought.
That is a braun epilady adapter from the 90s 🙂
Someone in my family had this vacum cleaner after 1 year, the battery died, so I replaced the 18650 cells and it lasted again yust 1 year. So it seems that the bms or the other ciruit is destroying the 18650 cells.
21:50 The dog is cuter than the cat.
Looks like Rowenta beat Apple to the Vision Pro brand. 😊
Looks like some quality junk. Perhaps with better strain relief those wires would have held up longer? With that pivoting design though it just wasn't long for this world.
have to disagree with Diodegonewilds thinking here, i much prefer cordless (higher end cordless to clarify, these have a ton of suction even when the brush is off) over wall powered, especially while vaccuuming stairs its just much easier to not have the heavy motor to drag up the stairs and the cord. also anoying is having to unplug and plug back in the corded one if you are beyond the lenght of wire. of course if you use cheap no name ones Corded is better.
Great video just shows the lack of education can cause waste
2:49 LOL
直流電缺點 負極「電子流的正極」一定會因為濕氣太重與髒污鏽蝕斷線
I'd rather buy this Vision Pro than a first generation Apple product.
It was probably thrown out because someone couldn't connect it to WiFi and decided it has to be broken.
The cat question is hilar😂ious
Wow that thing looked pretty cheap and chinese, so its suprising it has an LG chem battery pack!!
Corded vacuum cleaners suck, but not as bad as Battery powered ones.
I stead of tressing, donate the whole unit to someone near you, they can use it as main working vacuum cleaner.
I thought of this, I hate wasting too, but finally I decided not to donate this biohazard with the charger and the brush missing.
15:00 typical SEB quality
4:20 Bloody hell! 25V battery but it wants you to charge it using 36V?
25.2V works out at 7 cells in series (7 x 3.6 = 25.2) so you should give it 7 x 4.2V = 29.4V.
Giving it 36V would overcharge the batteries as 36V is for 8-9 cells at 4.2V or 10 cells at 3.6V?!
The power supply is used in a constant current mode (it has to have internal current limiting circuitry). The circuitry of tha vacuum cleaner disconnects it from the battery when the battery reaches 29.5V.
@TheSpotify95: That’s not how lithium charging works - you NEVER just apply the voltage from the power supply directly to the battery! Proper* lithium charging requires highly accurate current and voltage control (to within a few mV is typical in an off the shelf charger chip), performed in multiple phases, the main ones being a constant-current phase until the charge termination voltage (around 4.2V) is reached, followed by a constant-voltage phase until the termination current (typically 1/10 of the current of the constant-current phase) is reached. Nobody builds their own lithium chargers from scratch anymore, because you just use a lithium charger IC that handles it for you. So the 36V is the power supply for the actual charger IC inside the vacuum, and that charger IC then regulates that down to the voltage applied to the battery.
Why they chose to do this nonsense - relying on the current limiting in the power supply, and just disconnecting the power supply when the voltage goes too high - makes no sense. In another comment, someone said that this vacuum model ruins batteries fairly quickly, and this dumb-ass charger is probably why.
*proper in the sense of safe (not going to overcharge batteries and cause them to explode) and optimizing the lifespan of the batteries.
"NO BAG"
That's a feature these days?
18:00 I was wondering why they bother with different power settings; after all, why would anyone ever want their vacuum cleaner to create less than the maximum amount of suction?
Of course, the reason is so the manufacturer can have an excuse to lie about how long the battery lasts.
For vacuuming things with loose fabrics, like curtains.
@@tookitogo Sure, that's the plausible reason they give if anyone ever asks, but no human being has ever done such a thing.
But they'd have us believe that activities requiring the low power setting (such as vacuuming curtains, or lace, or the delicate eyelids of a sleeping infant) are so common that they use this as the basis for their battery life calculations. Balderdash!
@@jhonbus I have, on occasion!
But of course using that as a basis for battery life is highly deceptive, I totally agree.