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[Q] Battery Stuck at 100% for an hour, shuts off at 20%

Hey guys, i've seen some other threads about batteries being stuck at 100% but they were generally with rooted devices so i figured i'd make one here.
The Problem
My infinity will charge fine, usually 1% per minute and when discharging going from 100% to 35% in about 5 hours screen on time, mainly using web apps, no real gaming, maybe dead trigger for 20 mins per charge. However when i take my tab off the charger it will stay at 100% for over 45 mins, and most recently over 1h 20m, causing the battery reading to be way off. Today it randomly shut down claiming i had 20% left.
Does anyone have any ideas? Like i said device is non-rooted and i dont have much interest in rooting it. Problem started just before we got the Jelly Bean update, and i got the tab in mid august, so it was working fine for a couple months.
The next logical step would be to factory reset and contact asus if that doesn't solve anything. I was hoping to avoid that if you guys had any tips or tricks.
Thanks

My TF700T has just started doing this. So your not the only one. I've only just started to search around for a solution.

sideswipe14 said:
Hey guys, i've seen some other threads about batteries being stuck at 100% but they were generally with rooted devices so i figured i'd make one here.
The Problem
My infinity will charge fine, usually 1% per minute and when discharging going from 100% to 35% in about 5 hours screen on time, mainly using web apps, no real gaming, maybe dead trigger for 20 mins per charge. However when i take my tab off the charger it will stay at 100% for over 45 mins, and most recently over 1h 20m, causing the battery reading to be way off. Today it randomly shut down claiming i had 20% left.
Does anyone have any ideas? Like i said device is non-rooted and i dont have much interest in rooting it. Problem started just before we got the Jelly Bean update, and i got the tab in mid august, so it was working fine for a couple months.
The next logical step would be to factory reset and contact asus if that doesn't solve anything. I was hoping to avoid that if you guys had any tips or tricks.
Thanks
Click to expand...
Click to collapse
I suggest you make a backup then do a a factory reset (twice). After that check to make sure this issue is gone, before re install any apps. If this doesn't resolved the issue, you need to reflash the full Asus firmware. This eliminated your software issue, and the last 1% chance is your hardware.(but very rare).

buhohitr said:
I suggest you make a backup then do a a factory reset (twice). After that check to make sure this issue is gone, before re install any apps. If this doesn't resolved the issue, you need to reflash the full Asus firmware. This eliminated your software issue, and the last 1% chance is your hardware.(but very rare).
Click to expand...
Click to collapse
I've done as you suggested. Including factory reseting the tablet twice.
I've had the tablet off the charger for 14 hours and 28 minutes. And it's still showing 100%...
Worth noting: It was fully charged with the dock this morning. I've taken the tablet off the dock and used it for the day and it's still 100%
Anyone else got any other suggestions?

Same problem here, started two days ago, the transformer shuts down at ˜33-35%. Installed battery monitor app and it reports ˜500mAh still availble just prior to the shutting down. After it shuts down it's dead until I plugg it the power chord, it charges to 100% but then the same story again, shutting down at 33-35% remaining battery left. I've tried the battery calibration app which deletes the batterystats.bin file but that didn't do anything. Also tried three factory resets without any success... I'm on stock ROM but rooted.
Any ideas to what to try now? Or should I wait for the next firmware upgrade and see if the reflashing of the firmware will resolve this?
How do I reflash the installed firmware version, want to try that next...

dbuc said:
Same problem here, started two days ago, the transformer shuts down at ˜33-35%. Installed battery monitor app and it reports ˜500mAh still availble just prior to the shutting down. After it shuts down it's dead until I plug it the power chord, it charges to 100% but then the same story again, shutting down at 33-35% remaining battery left. I've tried the battery calibration app which deletes the batterystats.bin file but that didn't do anything. Also tried three factory resets without any success... I'm on stock ROM but rooted.
Any ideas to what to try now? Or should I wait for the next firmware upgrade and see if the reflashing of the firmware will resolve this?
How do I reflash the installed firmware version, want to try that next...
Click to expand...
Click to collapse
What do your power saver settings show under settings?
Mine are at 10%
Have you factory reset your tablet recently?

Thats OK said:
What do your power saver settings show under settings?
Mine are at 10%
Have you factory reset your tablet recently?
Click to expand...
Click to collapse
Everything in power saver settings is left default, 15%. But the transformer never reaches that level..
Oh, and I also have the same behaivor as the orginator of this thread, the battery shows 100% for good while after a full charge until it stops dropping, forgot to mention that. My tablet is four month old and this just started... Unfortunaltey is feels like a HW issue with the battery reporting the wrong remaining charge to the OS... But I will wait for a new firmware to see if a reflash resets the battery configuration somehow.

dbuc said:
Everything in power saver settings is left default, 15%. But the transformer never reaches that level..
Oh, and I also have the same behaivor as the orginator of this thread, the battery shows 100% for good while after a full charge until it stops dropping, forgot to mention that. My tablet is four month old and this just started... Unfortunaltey is feels like a HW issue with the battery reporting the wrong remaining charge to the OS... But I will wait for a new firmware to see if a reflash resets the battery configuration somehow.
Click to expand...
Click to collapse
My TF700 shut down at 25% battery today. I think it's time to contact ASUS to see what they can do.

BlueChan said:
My TF700 shut down at 25% battery today. I think it's time to contact ASUS to see what they can do.
Click to expand...
Click to collapse
Try to poweroff your device and let it stay down for 1/2 hrs, then power it back on see if that resolved your issue.

You need to recalibrate the battery.

buhohitr said:
Try to poweroff your device and let it stay down for 1/2 hrs, then power it back on see if that resolved your issue.
Click to expand...
Click to collapse
This is what I did. except I left it plugged in over night, then unplugged it, turned it on and it is back to normal.

buhohitr said:
Try to poweroff your device and let it stay down for 1/2 hrs, then power it back on see if that resolved your issue.
Click to expand...
Click to collapse
I tried this to no avail. Worth noting the device was off for about 5 hours when the battery went flat. I've also tried turning it off and charging it.

I have a TF700 on a TF300 dock, and I have found that if I unplug the tablet from the dock, while the dock is plugged into the wall, it stays at that battery level until I plug it back into the keyboard. Deleting batterystats.bin, turning it off, waiting long enough for it to get to 8.4V, and then doing a cold boot seems to fix it.

[Q] Tablet turns off

I'm having problems with the battery, the tablet only charges up to 83%, and trurns off at 17% without any warning. Does anyone know how to solve this problem?
I've got 10.6.1.14.4 WW Bootloader, TWRP 2.5 and i've triead both roms Cromi and Cm..
I've wiped data, factory reset and it still the same problem

Pedronabais said:
I'm having problems with the battery, the tablet only charges up to 83%, and trurns off at 17% without any warning. Does anyone know how to solve this problem?
I've got 10.6.1.14.4 WW Bootloader, TWRP 2.5 and i've triead both roms Cromi and Cm..
I've wiped data, factory reset and it still the same problem
Click to expand...
Click to collapse
Give it a try, uncheck "low batter saving mode" in settings, use it until it die, then let you device power off for 2 hrs, then charge it backup to full.

buhohitr said:
Give it a try, uncheck "low batter saving mode" in settings, use it until it die, then let you device power off for 2 hrs, then charge it backup to full.
Click to expand...
Click to collapse
i'll try and report
thanks

Chesterblue137 said:
i'll try and report
thanks
Click to expand...
Click to collapse
I had this issue myself. Allowing it to die and charging did not solve it for me, though it may for you, I had to delete the battery stats, drop the charge till it died, and let it charge between 5 to 8hrs overnight. Weird... but it worked, its worth noting that it didn't work until I did all three.

faustus1005 said:
I had this issue myself. Allowing it to die and charging did not solve it for me, though it may for you, I had to delete the battery stats, drop the charge till it died, and let it charge between 5 to 8hrs overnight. Weird... but it worked, its worth noting that it didn't work until I did all three.
Click to expand...
Click to collapse
you said "drop the charge till it died" but mine died at 40% last time, is that considered dying?

Chesterblue137 said:
you said "drop the charge till it died" but mine died at 40% last time, is that considered dying?
Click to expand...
Click to collapse
Yep, run it till whenever it dies, you can find apps to wipe the battery stats btw, and I know TWRP has an option in recovery for it also.

Problem solved, the device was sent to Asus and they switched the battery for no cost... Nice

[Q] Can not get correct battery reading! Please Help!!

All of a sudden my phone started to turn off when it read that there was still battery life left on device. But it will not boot up until I plug it into a charger. Once I do, there are times it reads 100% charge, random %, or completely dead. Since the first time there hasn't been a time it has properly drain the battery with a proper shut down. I have done numerous factory resets and complete wipe/fresh ROM flash. Currently I am on CM snapshot M6. If anyone could please me that would be great. It is starting to become pain in my side.
Thanks.

k_OsPhnez said:
All of a sudden my phone started to turn off when it read that there was still battery life left on device. But it will not boot up until I plug it into a charger. Once I do, there are times it reads 100% charge, random %, or completely dead. Since the first time there hasn't been a time it has properly drain the battery with a proper shut down. I have done numerous factory resets and complete wipe/fresh ROM flash.
Click to expand...
Click to collapse
same here (d802 variant)...
i know it's been 5 years since your issue, but did you found a solution for this? was it a battery, motherboard or something else...
i hope you remember if you solved it

How to fix Nokia 3 Not Fully Charged when you have twrp

I'm making this post because I have seen many people complain about their batteries not reaching 100%. This solution works if your problem started after you flashed/booted TWRP. If you have this problem and you have never booted into TWRP, I'm not sure this will work for you.
I noticed that everytime I booted into TWRP - especially if I made a system backup, my battery would not charge to 100%. Initially I solved this problem by disconnecting my battery then reconnecting this, but this will void your warranty and I realise that most people would not want to go this route.
Perhaps it's a bug in the version TWRP that is available for the Nokia 3, or maybe it's not really compatible with it, but whatever the case, in my experience, the battery is always reading 50% regardless of what percentage the battery was on before, and charging never affects the state.
Anyway if you find yourself in this situation, this is what you should do:
1. Let your battery run down till it reached 0% and shutdown.
2. Boot into recovery (holding the power down and volume up buttons while the the phone is plugged into your laptop till the countdown reaches 0)
3. Once your phone enters recovery, unplug your phone and leave it for a while (15 mins or longer). When I tried it, I initially wanted to wait till my phone ran down but I was too impatient to wait that long. Some people have recommended formatting your cache partition, you can try that too; it cannot hurt.
4. Restart your phone and start charging.
Hopefully it will reach 100%. If it doesn't repeat the same process and wait a longer period of time in recovery, say 30 mins or until the phone powers off.
If you don't have twrp or a custom recovery you can still try the above process although I can't guarantee that it will work for you

Mine seems stuck on 80% after December patch, not rooted, bootloader is locked.
Sent from my TA-1032 using Tapatalk

Nikola Jovanovic said:
Mine seems stuck on 80% after December patch, not rooted, bootloader is locked.
Sent from my TA-1032 using Tapatalk
Click to expand...
Click to collapse
Ok, but have you thought of trying what I suggested? Booting to stock recovery after the battery has run down? Like I said before, I believe the phone is reading the battery status wrongly and when it sees the battery at 0% it shuts down even though the battery level isn't actually 0

Battery calibration will solve the problem.

My Nokia 3 doesn't charge fully and not even with a power bank.please help

Paulblaxley said:
My Nokia 3 doesn't charge fully and not even with a power bank.please help
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Click to collapse
Have you tried using a battery calibration software from the play store?

Poco f2 pro charge only to 89%

Hello guys,i bought poco f2 pro global a week ago.My problem is the follow:
When i put my phone for charging the process go to 89% and freeze there.if i disconnect and connect again the charger then its make it 100%!?u can wait 5 h but no more than 89%.
Its very anoyning ,coz when i got to bed i put the phone on charge and at the morning i get it on 89%.
Factory reset didn't solve it.Any ideas?thx

Try draining the battery to 0%, then let it charge uninterrupted and see if that helps..

Hi if you've seen some of my posts. I got a Poco F2 Pro and on the second day it started showing 1% battery charge all the time. As well as an overheating issue and would close the camera after 5 seconds. Not sure what I did other than turned it off and let it charge a few times. For no known reason it started working fine. That was a week ago, so haven't had the problem occur since.
I'd check while the phone is off what the battery level shows as. If it still shows 89% it might be more serious, otherwise could be a bug

Fast78i said:
Hello guys,i bought poco f2 pro global a week ago.My problem is the follow:
When i put my phone for charging the process go to 89% and freeze there.if i disconnect and connect again the charger then its make it 100%!?u can wait 5 h but no more than 89%.
Its very anoyning ,coz when i got to bed i put the phone on charge and at the morning i get it on 89%.
Factory reset didn't solve it.Any ideas?thx
Click to expand...
Click to collapse
ITs not uncommon a miss-calibrated battery. Make a full discharge, wait all the time until your phone is power off. Once completely drained, try (without charger) power on some times, to be completely sure is totally death. Now, make a complete Full cicle. This time, the phone should reach 100%

Thank you all for the suggestions. I discharged the battery to 0 %,then plug it again and the result was 92%.So no luck..I really hope that this is software bug and will be fixed with miui 12 .Will be very unlucky if my unit is defective.the phone is a week old .what do you think,if i download the present software and flash it , maybe that's will help?

Theliels said:
ITs not uncommon a miss-calibrated battery. Make a full discharge, wait all the time until your phone is power off. Once completely drained, try (without charger) power on some times, to be completely sure is totally death. Now, make a complete Full cicle. This time, the phone should reach 100%
Click to expand...
Click to collapse
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.

Snah001 said:
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.
Click to expand...
Click to collapse
Some devices that I have seen with the same behavior would not think the same as you, obviously with a healthy battery. A bad battery can behave abnormally too, but I doubt that is the case.
And yes, it can be called a ... "calibration", although nothing to do with the supposed magic cures of deleting the battery statistics file. What happens is not that % battery is lost or that the battery is not fully charged. In fact, if the battery is fully charged, it is the count that fails. This is perfectly evident, when the phone reaches 1% it stays in that% much longer than usual, because the phone really did not have 78% (for example) and is not full drained yet. Once the battery is completely drained, the margins are recalculated correctly again. It is not a bad battery that is not fully charged, it is fully charged, what happens is that the battery reports incorrect data due to a "calibration" mismatch.
In any case, the partner will be able to tell us perfectly if it worked, or not . I repeat, there are many phones that I have seen with this behavior and many that have returned to their being. It is clear that if the battery is bad it will continue to be bad. It has happened to me in the past with a pair of Xiaomi phones, the last one a Redmi 6, is not uncommon

Snah001 said:
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.
Click to expand...
Click to collapse
Hi
Sorry , i don't have anything intelligent to say about battery calibration (except that if the battery sound faulty, take advantage of the phone warranty while you can!)
So... I just saw @Snah001 had a F2 pro and a Mi 9T pro... Could you please give us your quick opinion and advice here ? https://forum.xda-developers.com/poco-f2-pro/help/poco-f2-pro-t4137287
Thanks so much
Cheers !