I had a old android tablet that didn't turn on. When I plugged in a power adapter it didn't seem to charge. After a few minutes it was still completely unresponsive (no battery charging indication etc.) However, after leaving it plugged in, it eventually started charging after a few hours. It must have been "trickle charging" at first, a phenomenon that others have mentioned. The lesson is that if you have an item with an internal battery that seems completely dead, let it charge for a very long time, maybe 24 hours, before deciding that it needs extreme measures to repair.
I had a problem with Ryobi batteries doing the same. They would show as defective, but if you gave them a jumpstart they would work again. You just always had to make sure you didn't run the battery down to 0% or you'd have to jumpstart them again.
That "sipping a trickle of power" may have been the charge circuit trying to revive the low cells. Many chargers do a VERY slow charge on low cells until they finally rise to a safe charge voltage, then they will switch over to the normal charge rates. This can take hours if at all though, so opening up and manually charging can also help. Any cells run super low are likely to have lost considerable capacity and likely to puff up over a short time.
Theres only 1 'cell' , its a 3.7/4.2v lithium battery. Depending on the quality ( which will be low) it should be fine down to 3v as resting the battery will raise the remaining charge a little. Personally if it goes below 3v with no load id bin it as its not worth the risk.
I had this with a tablet I owned. Googling gave the advice disconnect the battery internally and reconnect. After doing this the battery took a charge. Pain in the a*se having to ho inside to do it mind!
Hey Steve, just got into electronics and soldering watching all your video's. Lot's of 'botches' with the practice kit's but getting there! 😊 - keep up the great work!
There was a similar issue with the old Nexus tablets. Sometimes you had to plug/unplug them a few times to get it to take enough charge to get the battery kickstarted. Then it would take a charge eventually. Sometimes unplugging the battery for a few mins would work too. We had so many come back faulty at the place I was working at the time.
I binge your stuff on Sundays while I'm trying to get motivated.. then this drops.. I guess I'll be a little later to get going than I thought :) Much love from across the pond!
This reminds me of the 1st gen Framework laptops. They had a tiny rechargeable BIOS battery that if you didnt use your laptop for a week or two it would run out and refuse to turn on. Really handy.
@@yotoprules9361 Yeah cause a real stink when myself and a few others mentioned it on the forum. We had a lot of push back then all of a sudden loads more had it and they had to admit it was an issue and find a fix. It only affected the 11th gen ones.
You hear about this potential issue in lots of vids but I've never actually seen one where the battery just needed a Kickstart. Quick vid but you've finally proven it's existence to me, so cheers 😊
I think your diagnoses is correct. I've come across charging systems that refuse to charge because the voltage is so low it doesn't recognize the battery as a battery. Don't want to start a fire by dumping voltage into a ground fault or something I guess.
Idk how to feel about stuff like this. I'm glad you saved it from the dumpster but jeez imagine all the stuff that's just been thrown out for no reason lol
Yep. It's not unusual at all for a device like that (tablet, phone) to get so low that a person thinks it's totally dead and unfixable, when many times you just need to leave it plugged in for a few hours to even see activity.
I've had a couple of things that done this (phone and old iPod). I heard it's because the devices always draw a little power to recognise when a charger gets plugged in, even after the device shuts off as a flat battery, this can make a battery completely dead. I used to put the device on a radiator or get it a little hot, it normally gave a very very slight voltage to the battery, enough to recognise a charger and start charging.
this is ringing bells, you get a catch-22 situation where the there's no power in the battery to fire up the charging circuit which recognises the power adapter. Heard about this happening on some phones (may have been windows aswell). Nice one !
I've had this happen to various devices. The power control circuitry in both the device and charger aren't intelligent enough to prevent back feed of power from the battery if it's left connected to the charger but not to power. I had a phone die on me like that years ago when I left it to charge in the car overnight while camping. Didn't consider that the power socket would go off 10 minutes after the key was removed. Woke up to a brick. Always been able to bring them back by manually charging the battery to reset the protection chips.
I have a Samsung tablet that over the summer I hadn't used in several weeks. When I went to charge and use it it took like an hour just to even acknowledge it was charging. Until that point I thought for certain it was broken somehow.
yeah sounds like a battery issue. The switch has the exact same issue, as once the battery is worn out it won't charge fast enough to charge the device so you get a black screen. Most people suggest in that case to leave it charging overnight and hoping.
This happened with a gameboy sp I was working on when I plugged it in absolutely nothing but when I plugged it and unplugged it several times it kicked the battery into action and now works fine
Also here to repeat the trickle charge phenomenon. Worked in telco for a decade, lots of mobile handsets got left in drawers. The advice to "charge for 24 hours" was very real back in the day because of the fact that it was not only ensuring the phone was indeed dead. I'd have a bank of chargers humming and hissing away, come back the next day to check customers phones. A fair amount would come back on just fine for customer to throw back in that drawer again.
This is a common problem with lithium batteries. Once it drops below the low voltage threshold, it wont charge unless kick started. It's a safety thing i believe for big in rush current can cause fires.
5:09 you connected the battery on the output voltage of the module. The battery goes to the terminals labeled as B+ and B-. The other ones are for the load or the device you want to use the battery.
Steve I had an Ipad from work that was the very same: refused to charge and had sat in a shelf for months until the battery was down to sub-zero. I had to take the hairdrier to it, and warm up the battery. That finally allowed it to start taking a charge and recover. Interesting to see it happen on a Windows tab, I wonder if it's something to do with the form-factor or just the design of a Tablet battery?
Dear Steve, just to mention: You connected the charging board the wrong way. Battery should be connected to B+ and B-. But anyway, congratulaton for your success.
I'm playing with a queen of multimeters at the mo, GPO 12c/1 which has a definite brandy and cigars aura, off down the golf club in ones Alvis whilst remembering there is two "i"'s in aluminium... :P
If it has ca LiPo battery they it's very possible that it was stored without being charged. LiPo batteries normally have a control chip built into them. If they discharge beyond a certain voltage the chip that controls the charging will sometimes no longer recognise a voltage in. You have to force in a charge bypassing the controller chip and then it will work as normal. LiPo batteries are one of the best but you need to treat them with care and never let them run down and store them without a charhe.
I've had a few things like that where the battery got so low you thought it was goosed but if left on charge long enough it does start charging. Though some devices now have an intelligence chip (stupid chip) that locks the battery from ever being charged if the voltage falls too low, even if it's brand new!
It is a safety feature, a damaged lithium battery can have a low voltage and trying to forcefully charge it can make it catch fire. That would cost millions if not billions in claims. If it's a new device or still under warranty simply return it.
I think verification of the battery charging circuit, in the computer, itself, and of whatever brick was used to routinely charge it, is indicated/needed.
Things can go very low if not used for a while. My switch put a charging symbol on for a long time and would not switch on booting and immediately going back to battery symbol. Only drawing 0.4 amps. Tried different charger and no different. After 15 minutes it suddenly powered on and drew 1.6 amps. Even then only on 1 percent! So it might charge really slowly and allow it to work when it hits a certain voltage.
Sometimes you just need to leave it on charge overnight and that small draw you had at the start will eventually give the battery enough power to boot the Ipad up.
Looking at the voltage the battery had before forced charging, it had just dropped too low for the bms of the tablet to charge. Its a safety feature as it can be dangerous to charge batteries that are too low on charge.
It's the same with power tool batteries if the get too low the charger won't charge them but if you use a 12v battery charger and trickle charge them for 30 mins they will then be recognised by the charger
Hey Steve! You connected the battery Charging Connector wrongly! You hooked it into the OUTPUT of the Board, used to Drive Electronics from the Board (that one has Battery protection for
My guess would be, that there is some kind of protection circuit on the battery which disconnected the battery due to low charge. The tablet did not charge it, because it saw no battery at all (no voltage) - but the usb-c charger just started pushing out voltage/current, which usually resets those protection circuits. I have had a couple of badly puffed up cells, and even those at least showed roughly 1v under no load, so 0 volts just screams protection circuit...
Maybe patience would have fixed it. i.e. leave the charger on for 2 days as it flashes 0.18Amps into battery, and eventually it might have enough charge to charge properly.
I noticed quite often with batteries with a charge controller built into them that they don't always give you a voltage, and instead you need to measure them from the raw battery terminals. That may be the case for this one, or I guess it is possible the battery is really just super flat
used to be a windows update that binned your battery around this era (just as windows 10 launched) it would software lock your option to charge cause the battery was a bit old
Unplugging the battery could have drained all residual of charge which could have caused a safety feature to cut charging. Once circuit board completely drained it would reset everything. Also charging the battery separately most likely help. Iv had many pc start back up after I drained the motherboard.
I've got a BlackBerry Playbook with a similar issue, and I assume a lot of devices do this as a protection measure. The charging circuits refuse to charge undervolted batteries because it assumes the battery is bad altogether (that, or the residual charge of +~3.5v supplements the charging/standby function)
I've run into this with lead acid batteries. A smart charger wouldnt wake them up. A traditional charger was needed. That lion is likely on its way out however.
Gotta hand it to Caterpillar for at least making this thing super repair friendly!! I must say I do prefer a few dozen screws and silicon seals over some stupid adhesive!
I had a simular problem on an asus tablet it wouldnt charge using the supplied charger but when I used a quickcharge that I got with my phone it did charge even though the tablet patently didnt have quickcharge.
I need to find some of those lithium ion charger boards they seem to be very handy. Since you fixed this tablet now what? Does the person want it back or can you keep it and play games on it, like Minecraft.
i have a USB splitter cable (for charging led shoes) and found that if you plug one cable into a working device and one into a dead device, I tends to charge them
This is an issue with all modern hand held devices that have a soft power button. The electronics uses a bit of battery all the time when switched off to check the power button. So they go totally flat eventually. Phones, tablets, game controllers, you name it - leave them unused for too long and the battery manager declares them toast.
it is a common issue but it's not all of them, usually there's some kind of undervoltage protection on the battery itself or on a charge controller chip that cuts the battery output if it gets too low. if the protection circuit is inside the battery you can actually get a voltage reading of 0 volts on the battery terminals when this has cut off even if the internal voltage of the battery is higher than this, and as soon as the mainboard applies charge voltage to the battery again this should reset and start voltage output again. Even the TP4056a charger board steve used to charge the battery has this function provided by the small DW01 chip and mosfet
@@mojoblues66 I repaired electronics for 30 years and have had ipads as well as iphones like this. Leave your Apple stuff totally flat in a drawer for about 12 months after being flat and the units BMS won't allow it to charge again as it sees the battery as then too low. Lipos continue to lose about 2% a month just connected to nothing. Sony playstation controllers do it after about 12 months of being flat, as do Nintendo Pro controllers.
@@MikeB_UK I have iPads and iPhones laying around for more than 12 month and they do spring back to life after being connected to a power sources for about 5 min.
@@mojoblues66Well good for you. In about 10 years before I retired I had to sort dozens of iPhone 4's, 5's, 6's, 7's and 8's that would not come back to life without opening and either shunting power to the battery or replacing it. I had Samsungs, Huawei, Amazon, you name it. In every case the customer had run it totally flat them put it away for months as not wanted, then tried to get it working to give to family or friends. Every lipo in anything has a BMS that controls the charging and they stop usually lower than 3v per cell. Once the lipo self discharges to this you have to bypass that to jump start the cells back to over 3v each - and then the cell is pretty dodgy. Please don't send me any more on this. I was paid to fix hundreds of lipo dead devices. I suspect you have never done so as a job.
I've found that when a device like this won't turn on, plugging it into a pc port for a bit seems to jump start it for whatever reason. Works on dead handheld gaming devices anyways.
2 years ago my tablet got battery drain it wont charge or open anymore so i left it on charge for 1 day and when i get back its working again.. i guess it will take time for it to accept the charge.. you just have to wait a very long time for it to be alive again..
I had a old android tablet that didn't turn on. When I plugged in a power adapter it didn't seem to charge. After a few minutes it was still completely unresponsive (no battery charging indication etc.) However, after leaving it plugged in, it eventually started charging after a few hours. It must have been "trickle charging" at first, a phenomenon that others have mentioned. The lesson is that if you have an item with an internal battery that seems completely dead, let it charge for a very long time, maybe 24 hours, before deciding that it needs extreme measures to repair.
I love those battery charger boards. Would never have thought to use capacitor/resistor legs on them though. Great tip, thanks!
"If it explodes I will keep the camera rolling" 🤣🤣
That's what she said.
really liked the music on this one!!
Congratulations on your best rap yet*
*there are some old videos I’ve not got round to watching yet so may be wrong
😂 thanks Mr Thing
Yes I agree I thought it was one of his best yet
I had a problem with Ryobi batteries doing the same. They would show as defective, but if you gave them a jumpstart they would work again. You just always had to make sure you didn't run the battery down to 0% or you'd have to jumpstart them again.
That "sipping a trickle of power" may have been the charge circuit trying to revive the low cells. Many chargers do a VERY slow charge on low cells until they finally rise to a safe charge voltage, then they will switch over to the normal charge rates. This can take hours if at all though, so opening up and manually charging can also help. Any cells run super low are likely to have lost considerable capacity and likely to puff up over a short time.
Theres only 1 'cell' , its a 3.7/4.2v lithium battery. Depending on the quality ( which will be low) it should be fine down to 3v as resting the battery will raise the remaining charge a little. Personally if it goes below 3v with no load id bin it as its not worth the risk.
You are not allowed to say "puff up" anymore 🏳🌈
I had this with a tablet I owned. Googling gave the advice disconnect the battery internally and reconnect. After doing this the battery took a charge. Pain in the a*se having to ho inside to do it mind!
Hey Steve, just got into electronics and soldering watching all your video's. Lot's of 'botches' with the practice kit's but getting there! 😊 - keep up the great work!
There was a similar issue with the old Nexus tablets. Sometimes you had to plug/unplug them a few times to get it to take enough charge to get the battery kickstarted. Then it would take a charge eventually. Sometimes unplugging the battery for a few mins would work too. We had so many come back faulty at the place I was working at the time.
I binge your stuff on Sundays while I'm trying to get motivated.. then this drops.. I guess I'll be a little later to get going than I thought :) Much love from across the pond!
This reminds me of the 1st gen Framework laptops. They had a tiny rechargeable BIOS battery that if you didnt use your laptop for a week or two it would run out and refuse to turn on. Really handy.
That's a very major design flaw.
@@yotoprules9361 Yeah cause a real stink when myself and a few others mentioned it on the forum. We had a lot of push back then all of a sudden loads more had it and they had to admit it was an issue and find a fix. It only affected the 11th gen ones.
They must've copied Dell; they refuse to boot when the CR2032 is flat.
@@Okurka. Not really. The CR2032 lasts years and isn't recharging. That's not a problem.
You hear about this potential issue in lots of vids but I've never actually seen one where the battery just needed a Kickstart. Quick vid but you've finally proven it's existence to me, so cheers 😊
I think your diagnoses is correct. I've come across charging systems that refuse to charge because the voltage is so low it doesn't recognize the battery as a battery. Don't want to start a fire by dumping voltage into a ground fault or something I guess.
Idk how to feel about stuff like this. I'm glad you saved it from the dumpster but jeez imagine all the stuff that's just been thrown out for no reason lol
Yep. It's not unusual at all for a device like that (tablet, phone) to get so low that a person thinks it's totally dead and unfixable, when many times you just need to leave it plugged in for a few hours to even see activity.
The devil, as regards to lithium batteries, is definitely in the detail.
Great quick fix well done Steve 😊
that Dubstep-Rap is insane, i love it ... pls more of it. Peace!
This is my new fav Channel on youtube
AFAIK you should connect the battery to module B- and B+ pads.. great content!
I was shouting the same thing at my screen too😀
I've had a couple of things that done this (phone and old iPod). I heard it's because the devices always draw a little power to recognise when a charger gets plugged in, even after the device shuts off as a flat battery, this can make a battery completely dead.
I used to put the device on a radiator or get it a little hot, it normally gave a very very slight voltage to the battery, enough to recognise a charger and start charging.
this is ringing bells, you get a catch-22 situation where the there's no power in the battery to fire up the charging circuit which recognises the power adapter. Heard about this happening on some phones (may have been windows aswell). Nice one !
I've had this happen to various devices. The power control circuitry in both the device and charger aren't intelligent enough to prevent back feed of power from the battery if it's left connected to the charger but not to power. I had a phone die on me like that years ago when I left it to charge in the car overnight while camping. Didn't consider that the power socket would go off 10 minutes after the key was removed. Woke up to a brick. Always been able to bring them back by manually charging the battery to reset the protection chips.
I have a Samsung tablet that over the summer I hadn't used in several weeks. When I went to charge and use it it took like an hour just to even acknowledge it was charging. Until that point I thought for certain it was broken somehow.
yeah sounds like a battery issue. The switch has the exact same issue, as once the battery is worn out it won't charge fast enough to charge the device so you get a black screen. Most people suggest in that case to leave it charging overnight and hoping.
This happened with a gameboy sp I was working on when I plugged it in absolutely nothing but when I plugged it and unplugged it several times it kicked the battery into action and now works fine
It will trickle charge eventually if you just leave the normal charger plugged in for like a day or so.
You are The Master of The Universe.
Also here to repeat the trickle charge phenomenon. Worked in telco for a decade, lots of mobile handsets got left in drawers. The advice to "charge for 24 hours" was very real back in the day because of the fact that it was not only ensuring the phone was indeed dead. I'd have a bank of chargers humming and hissing away, come back the next day to check customers phones. A fair amount would come back on just fine for customer to throw back in that drawer again.
This is a common problem with lithium batteries. Once it drops below the low voltage threshold, it wont charge unless kick started. It's a safety thing i believe for big in rush current can cause fires.
5:09 you connected the battery on the output voltage of the module. The battery goes to the terminals labeled as B+ and B-. The other ones are for the load or the device you want to use the battery.
How many devices get ‘binned’ when there’s nothing wrong with it! Well done for getting it going again.
in Lov3 with the Rolling exploding stupid cover of Limp Bizkit. Nice!
Steve I had an Ipad from work that was the very same: refused to charge and had sat in a shelf for months until the battery was down to sub-zero. I had to take the hairdrier to it, and warm up the battery. That finally allowed it to start taking a charge and recover. Interesting to see it happen on a Windows tab, I wonder if it's something to do with the form-factor or just the design of a Tablet battery?
Dear Steve, just to mention: You connected the charging board the wrong way. Battery should be connected to B+ and B-. But anyway, congratulaton for your success.
I'm playing with a queen of multimeters at the mo, GPO 12c/1 which has a definite brandy and cigars aura, off down the golf club in ones Alvis whilst remembering there is two "i"'s in aluminium... :P
I saw the Queen of Multimeters on stage alongside Dave Lynne in Brighton two years ago. A consummate professional, good vocals and great legs. 💕
damn, best tune yet. bass line!!!
Stez got the flow today!!
If it has ca LiPo battery they it's very possible that it was stored without being charged. LiPo batteries normally have a control chip built into them. If they discharge beyond a certain voltage the chip that controls the charging will sometimes no longer recognise a voltage in. You have to force in a charge bypassing the controller chip and then it will work as normal. LiPo batteries are one of the best but you need to treat them with care and never let them run down and store them without a charhe.
Nice.
i have had plenty of kindles which have done the same thing
I've had a few things like that where the battery got so low you thought it was goosed but if left on charge long enough it does start charging. Though some devices now have an intelligence chip (stupid chip) that locks the battery from ever being charged if the voltage falls too low, even if it's brand new!
It is a safety feature, a damaged lithium battery can have a low voltage and trying to forcefully charge it can make it catch fire.
That would cost millions if not billions in claims.
If it's a new device or still under warranty simply return it.
I always love finding out if the week I'm going to be mentioned in the rap. I can never remember, lol.
I think verification of the battery charging circuit, in the computer, itself, and of whatever brick was used to routinely charge it, is indicated/needed.
Things can go very low if not used for a while. My switch put a charging symbol on for a long time and would not switch on booting and immediately going back to battery symbol. Only drawing 0.4 amps. Tried different charger and no different. After 15 minutes it suddenly powered on and drew 1.6 amps. Even then only on 1 percent! So it might charge really slowly and allow it to work when it hits a certain voltage.
I think you need to get a Big Clive approved explosion containing pie dish, just in case.
This is too complicated for Clive.
Sometimes you just need to leave it on charge overnight and that small draw you had at the start will eventually give the battery enough power to boot the Ipad up.
Take the W! take care my Dude.
Loved the song !
Looking at the voltage the battery had before forced charging, it had just dropped too low for the bms of the tablet to charge. Its a safety feature as it can be dangerous to charge batteries that are too low on charge.
It's the same with power tool batteries if the get too low the charger won't charge them but if you use a 12v battery charger and trickle charge them for 30 mins they will then be recognised by the charger
Take the easy W Steve. Nowt wrong with that.
Steve could u try converting a PC into a Chromebook?
Hey Steve! You connected the battery Charging Connector wrongly! You hooked it into the OUTPUT of the Board, used to Drive Electronics from the Board (that one has Battery protection for
Cam here to say the same, I was expecting an explosion at that point. 😂
I had the same point to say and thought I had been doing it wrong all this time. Lol 😂
But he fixed it without exploding. Well done!
just did a double take myself and came to say the same thing
Ask many questions you do , The force is strong .
My guess would be, that there is some kind of protection circuit on the battery which disconnected the battery due to low charge. The tablet did not charge it, because it saw no battery at all (no voltage) - but the usb-c charger just started pushing out voltage/current, which usually resets those protection circuits. I have had a couple of badly puffed up cells, and even those at least showed roughly 1v under no load, so 0 volts just screams protection circuit...
Pronouciation of Huawei made me laugh. Easy win for you. Good video my friend.
Similar thing happen to my surface RT many years ago
Bruv, this intro was bangin.
Maybe patience would have fixed it. i.e. leave the charger on for 2 days as it flashes 0.18Amps into battery, and eventually it might have enough charge to charge properly.
I noticed quite often with batteries with a charge controller built into them that they don't always give you a voltage, and instead you need to measure them from the raw battery terminals. That may be the case for this one, or I guess it is possible the battery is really just super flat
Hello!
Dear Stevefix have you had a look at my Sony wm20 I sent you back in may please 😅
I'm missing using it lol
Regards Paul
used to be a windows update that binned your battery around this era (just as windows 10 launched) it would software lock your option to charge cause the battery was a bit old
Unplugging the battery could have drained all residual of charge which could have caused a safety feature to cut charging. Once circuit board completely drained it would reset everything. Also charging the battery separately most likely help. Iv had many pc start back up after I drained the motherboard.
I've got a BlackBerry Playbook with a similar issue, and I assume a lot of devices do this as a protection measure. The charging circuits refuse to charge undervolted batteries because it assumes the battery is bad altogether (that, or the residual charge of +~3.5v supplements the charging/standby function)
I've run into this with lead acid batteries. A smart charger wouldnt wake them up. A traditional charger was needed. That lion is likely on its way out however.
Gotta hand it to Caterpillar for at least making this thing super repair friendly!! I must say I do prefer a few dozen screws and silicon seals over some stupid adhesive!
At 4.40 I had to listen til Kim Wildes Kids in America, and then watch the rest of Your video👌🏻😎
You should call that battery Han, because it's So-low
i probably would have still checked the the barrel jack to be sure it wasn't damaged though.
Nice
I was looking forward to lots of bodging and melted plastics 😁Ohh well, maybe next time.
169 Days since last melted plastic.
Nice
The rap was fire 🔥🔥🔥
I had a simular problem on an asus tablet it wouldnt charge using the supplied charger but when I used a quickcharge that I got with my phone it did charge even though the tablet patently didnt have quickcharge.
It will work just fine. Probably a safety measure kicked in when safety was not required.
Why does Cooie Jingus always stand out during the rap? Get outta my head!! WOOOO!!
now that is a lot of screws for a blooming Android tablet
Steve, do you have a link to the little lipo charging board you use to kick start the batteries?
Many thanks
Videos by the way are... nice
Dub step Stez 🔥🔥🔥
Not exciting, but quite interesting.
I need to find some of those lithium ion charger boards they seem to be very handy.
Since you fixed this tablet now what? Does the person want it back or can you keep it and play games on it, like Minecraft.
i have a USB splitter cable (for charging led shoes) and found that if you plug one cable into a working device and one into a dead device, I tends to charge them
Great vids Steve 👍 Can I ask what was the backing track you used for the dismantling rap please?
Thanks for the nice repair video. Who with a bit of common sense wants a Windows tablet... :-) :-) Keep up the good work and cheers ;-)
The first diag with sporadic charge was trickle charge
By leaving it to trickle for a while it would have started
I have an e-bike battery that needs kick-starting, or a kick up the charge socket. Heeeelp!!
Masterful names wrap today vos. Hats off to you.
(wa way) apparently stez
ooh tough
Banger track! Quickfire raps and all!
Some battery management systems react unpredictable and prevent the battery from charging.
This is an issue with all modern hand held devices that have a soft power button. The electronics uses a bit of battery all the time when switched off to check the power button. So they go totally flat eventually. Phones, tablets, game controllers, you name it - leave them unused for too long and the battery manager declares them toast.
it is a common issue but it's not all of them, usually there's some kind of undervoltage protection on the battery itself or on a charge controller chip that cuts the battery output if it gets too low. if the protection circuit is inside the battery you can actually get a voltage reading of 0 volts on the battery terminals when this has cut off even if the internal voltage of the battery is higher than this, and as soon as the mainboard applies charge voltage to the battery again this should reset and start voltage output again. Even the TP4056a charger board steve used to charge the battery has this function provided by the small DW01 chip and mosfet
You obviously only used cheap crap and never used an iPad.
@@mojoblues66 I repaired electronics for 30 years and have had ipads as well as iphones like this. Leave your Apple stuff totally flat in a drawer for about 12 months after being flat and the units BMS won't allow it to charge again as it sees the battery as then too low. Lipos continue to lose about 2% a month just connected to nothing. Sony playstation controllers do it after about 12 months of being flat, as do Nintendo Pro controllers.
@@MikeB_UK I have iPads and iPhones laying around for more than 12 month and they do spring back to life after being connected to a power sources for about 5 min.
@@mojoblues66Well good for you. In about 10 years before I retired I had to sort dozens of iPhone 4's, 5's, 6's, 7's and 8's that would not come back to life without opening and either shunting power to the battery or replacing it. I had Samsungs, Huawei, Amazon, you name it. In every case the customer had run it totally flat them put it away for months as not wanted, then tried to get it working to give to family or friends. Every lipo in anything has a BMS that controls the charging and they stop usually lower than 3v per cell. Once the lipo self discharges to this you have to bypass that to jump start the cells back to over 3v each - and then the cell is pretty dodgy. Please don't send me any more on this. I was paid to fix hundreds of lipo dead devices. I suspect you have never done so as a job.
I've found that when a device like this won't turn on, plugging it into a pc port for a bit seems to jump start it for whatever reason. Works on dead handheld gaming devices anyways.
Same for dead phones too. Just leave them charging for a long time - sometimes half a day. Eventually most come back from the dead - like zombies...
2 years ago my tablet got battery drain it wont charge or open anymore so i left it on charge for 1 day and when i get back its working again.. i guess it will take time for it to accept the charge.. you just have to wait a very long time for it to be alive again..
That barrel plug cable might be the wrong size, which is why it is so loose
I'm guessing the main board is made by CHUWI - I have a ~8 year old tablet that has the exact same charge LED behavior.
HUAWEI - HUWAA-WAY :)
Let it deplete fully then try charging again to see if that's the problem
That Phonk tho 😎
Windows 10 had such a good interface for tablets, similar to 8 but not identical
I always think of The Who song when I see that Chinese manufacturer - 'Who are wei'
I do have a tablet with that problem... could it be the same issue? Need to buy a charging dongle first...