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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.
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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.
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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.

Battery loads spontaneously?

Hi,
I loaded my TR101 yesterday to 99 or 100% ( tablet, undocked), disconnected it from the adapter, used it for some time, and then shut it off. The battery level was around 75% then.
This morning I started it again and the battery level was 98%! So it tells me it loaded in the night from 75 to 98% from thin air. No adapter connected. The dual battery widget shows this too: battery level went up from around 75 to 98.
Is thre any explanation for this? I suppose the battery level is not really 98, but what happened? I conbected the adapter, and the it starts loading to 100%.
I am no twaeker, so I did nothing unusual. I installed all the system updates Asus gave me. Now I have Android 4.0.1.
Any thoughts?
Sent from my Transformer TF101 using xda app-developers app

If you docked it again once you shut it off then the dock would have charged it

*Detection* said:
If you docked it again once you shut it off then the dock would have charged it
Click to expand...
Click to collapse
Yes, I know that the dock charges the tablet battery, but the tablet has not been docked for two days!
BTW: When I started the tablet (undocked) up again after two hours, the battery once more said that it was charged for 98%.
I then used it until the battery said it was charged for 31%. I wonder how the situation will be tomorrow.

First, wipe battery stats if you can. Second, empty it out completely (be careful about the 0% bug) then do a full charge.
Recommended battery use is always to empty it out completely then charge it completely. It'll extend its performance and lifetime.

How do I wipe my battery stats? I cannot find any control to do so. My tablet is not rooted btw.
Anyway: This morning when I started it up the battery icon was red and it shut down by itself (empty battery?), but when I started it up then with the adaptor the battery stood at 17%. This might have been the real status after several wrong indications yesterday, I suppose. Battery health is displayed as "good".
It only seems a matter of wrong indication. The battery last the normal time, it seems to me.
I will let it go to down now util just a few % and fully load it again then.
The reason why I normally shut the tablet completely down when I do not plan to use it for several hours, is that the battery drains when the tablet is 'sleeping', but when I shut it down completely it later starts up at the same level when I shut it down.
This sees to be an issue Asus had to solve (you could read about it all over the internet when I fist noticed it) but as usual Asus is only intrested in upgrading its latest models and soon abandons active support for what they consider "older" models.
However, I do not buy a new tablet every few months. I consider a tablet old after maybe 3 years or longer.
To continue the battery issue: Also, when I shut the tablet down when docked both battery levels have changed when I start it again. To avoid these battery annoyances I often shut it down.
Sent from my Transformer TF101 using xda app-developers app

Well the battery stats part is debatable really, but you need root as far as I know, so you can ignore that part.
About the battery draining while sleeping, I've heard other people having that issue. Not sure if it was ever solved... I haven't had that issue.
Last case scenario would be to make sure it's not a software issue by doing a full factory reset with something like Easyflasher. Corrupted files happens, and there's no easy way to "fix" it. Make sure you backup all important data as easyflasher will completely wipe your device clean, but it's the best way to confirm it's a software-related issue.

Hi,
A cold reboot did it!
For those of you that are as afraid of a factory reset as I am: a cold reboot does not wipe any of your data. You press the 'on/off' button together with 'volume down' button for about 10 seconds. You will see some small print and some unfamiliar pics on your screen. Ignore everything, because a cold reboot is the default thing that will happen.
When your Transformer has booted after this, several things have changed for the better, including your battery indication.
If this instruction is not clear enough, google for 'cold reboot Transformer'.
For me it worked and I found it to be fool-proof.
Sent from my Transformer TF101 using xda app-developers app

[Q] Battery or charger at fault?

I have a locked & unrooted WW TF700 & genuine dock on JB 4.2.1.
A week ago I started to notice an issue where the tab would constantly drain whilst it should have been asleep. Overnight it would loose ~30% instead of ~2%. I tried a few settings, but couldn't seem to solve it. I decided to do a factory reset because I haven't done one since I last upgraded to jelly bean. That appears to have cured that problem, but has created two more.
The first problem is that I can't seem to charge the tab over 81% when being charged directly. If I then plug it into a fully charged dock it will charge to 90% but no more, even with the charging cable in the dock.
The second problem is that the tab now decides to shut off at about 30% battery left. It won't shutdown as normal, just go blank and won't boot up again without being charged a little first. I have read threads about artificially overcharging the tab, but a symptom of that is the battery level will remain at 100% for hours before starting to drain normally. My tab won't charge to 100% and will start to drain immediately after removing the charging cable. Regardless I have tried to drain and recharge overnight with the tab both off and on but the tab won't charge past 76% overnight in either case. Restarting multiple times doesn't help at all.
For the first issue I started to suspect the charger may be at fault. This is because if I charge the tab directly, it will never get past 81%. However, if I then plug it into the freshly charged dock it will charge upto 90%. I understand that the dock will never charge the tab past 90%, unless it is plugged into the charger. Does it assume in my case that it isn't plugged in to a charger even when it is? I should mention I am using the original asus charger. Frustratingly I can't just use my phone charger to see if it solves the problem due to the 15v of the asus charger. I have noticed a slight hum/buzz coming from the charger but I can't be sure that it didn't do that before. I have had issues with the internal connections not be pushed together quite right before and getting no charge out of it, but 'clicking it together' a bit more firmly did the trick there.
Even with an overnight charge, plugged into the dock to get it to 90% I now get terrible battery life. Roughly 30mins per 10% juice. Previously I was getting around an hour per 10%.
Does anyone have an suggestions for me on how to eliminate the charger as a problem, or say doing another factory reset on a 'full charge'? The only other thing I can think of is to let it drain, give it enough charger to turn back on, then turn it off and leave it unplugged overnight (I saw it mentioned in another thread). I really appreciate any help you can give before I have to try the dreaded warranty route!

Try this with it undocked. Let the battery discharge to zero, and leave it 24 hours.
Then recharge it fully. This seems to cure the battery calibration memory issues.most us know how you get on.

Luckily I have located an Asus charger to borrow and hopefully find out if it is just my charger or not.
I also tried out CPU-Z and the battery is reporting as only having 7mV. I'm sure that can't be correct as my HOX+ is around 3500mV, and 7mV just couldn't power anything. I don't know if this is just CPU-Z issue with reporting correctly, or a clue that there is something not right with my battery? Has anyone else tried CPU-Z or know what the mV should be roughly, fully charged say?

Unfortunately a different charger didn't solve my issue :'(
I've posted a screenshot to show what is happening. I'll try draining the battery flat and leaving 24 hours to see what happens then. Luckily I still have two months left on warranty.
Pretty annoying because everything else the tablet does is fantastic. I replaced my laptop with it and use it daily for everything.
Sent from my ASUS Transformer Pad TF700T using Tapatalk HD

Unfortunately things have become worse. I tried using the tab until it died (at around 50% battery this time...) and left for 24 hours as suggested. Unfortunately now I can't get the tab to turn on or take a charge at all. I have tried holding power button down, with vol up/down, for over a minute etc. Tried the reset button all numerous times with no luck. All I get is the LED blink twice when pressing the power button and this only happens when the charger is connected, otherwise nothing.
I have the phone number for Asus support and will be giving them a call tomorrow. I'm so glad I never unlocked my device!

Gudders said:
Unfortunately things have become worse. I tried using the tab until it died (at around 50% battery this time...) and left for 24 hours as suggested. Unfortunately now I can't get the tab to turn on or take a charge at all. I have tried holding power button down, with vol up/down, for over a minute etc. Tried the reset button all numerous times with no luck. All I get is the LED blink twice when pressing the power button and this only happens when the charger is connected, otherwise nothing.
I have the phone number for Asus support and will be giving them a call tomorrow. I'm so glad I never unlocked my device!
Click to expand...
Click to collapse
Leave it for 24 hours not on charge first then try again. We've seen this happen so many times - the fix is to let it discharge completely.

sbdags said:
Leave it for 24 hours not on charge first then try again. We've seen this happen so many times - the fix is to let it discharge completely.
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Click to collapse
Thanks Sbdags, I appreciate your response. I've read numerous threads tonight with similar issues. I did try leaving the tab for 24 hours completely dead overnight last night. I'll try it again (I don't know if the battery is dead or not currently) but I'll leave it unplugged as there is nothing else for me to do with it anyway!

OK, I thought I would complete this thread.
After leaving my tablet for a few more days not on charge I could seem to get no life out of it whatsoever so went down the RMA route and the result of that is in the following thread;
http://forum.xda-developers.com/showthread.php?p=45065793#post45065793
Gudders.:crying:

[Q]

So a few days ago my device started to shut down at 15-20% battery. I use an battery app which makes me se how many % it is left on the battery and the original charge meter seems to be consistent with the app. It also doesnt let me start the device again unless I have a charger in. Another wierd thing is that i am not sure it is charging at all because it does not show in the icon sometimes... (I am writing this while making these observations )
I use the docking station mostly, could this mess things up when i only use the device itself?
I docked the device at 16% and after a few min of youtube it just crashed like before, not a regular shut down.
Is the battery busted because I use it constantly for the past 8 months? I mean I put it in sleep mode when I dont use it but I almost never shut it off.
Wierd, I think it stops charging the device if you leave it alone for a while. It shows it charges the docking station though. I would try other power outlets but somehow i feel it is connected to the first issue I had.

Stammis said:
So a few days ago my device started to shut down at 15-20% battery. I use an battery app which makes me se how many % it is left on the battery and the original charge meter seems to be consistent with the app. It also doesnt let me start the device again unless I have a charger in. Another wierd thing is that i am not sure it is charging at all because it does not show in the icon sometimes... (I am writing this while making these observations )
I use the docking station mostly, could this mess things up when i only use the device itself?
I docked the device at 16% and after a few min of youtube it just crashed like before, not a regular shut down.
Is the battery busted because I use it constantly for the past 8 months? I mean I put it in sleep mode when I dont use it but I almost never shut it off.
Wierd, I think it stops charging the device if you leave it alone for a while. It shows it charges the docking station though. I would try other power outlets but somehow i feel it is connected to the first issue I had.
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Click to collapse
Sorry stammis but neither your topic nor your post makes much sense to me.
Your problem is with the tablet docked or undocked?????
It may be a battery calibration problem. Some users have solved this by letting the battery drain in sleep or standby for a day or two.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4

berndblb said:
Sorry stammis but neither your topic nor your post makes much sense to me.
Your problem is with the tablet docked or undocked?????
It may be a battery calibration problem. Some users have solved this by letting the battery drain in sleep or standby for a day or two.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 4
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Click to collapse
Yeah i am sorry i am rambling here, i made a new post about the same issue. Its called "power down with 15% battery left"

[Q] Power down with 15% battery left

Hello my device keeps power down at 15% battery life, I have read that you can calibrate your battery, however because of circumstances It is not possible to flash my device. Are there anything else I could do or must I have my battery replaced by asus?

Stammis said:
Hello my device keeps power down at 15% battery life, I have read that you can calibrate your battery, however because of circumstances It is not possible to flash my device. Are there anything else I could do or must I have my battery replaced by asus?
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Click to collapse
I just had a warning that my battery is at 15% with out shutting down. Something is wrong on your setting or your app that you are using. My device will not shut down unless it is 0%.. I just want to give you the information on my device and don't have any fix for your device.. Good luck..

Others who had similar problems let the tablet rest with a drained battery for some hours, then recharged, and it somehow recalibrated the battery estimations.

_that said:
Others who had similar problems let the tablet rest with a drained battery for some hours, then recharged, and it somehow recalibrated the battery estimations.
Click to expand...
Click to collapse
Well the problem is that i cannot drain the battery since it shuts down at 15% and wont let me turn it on again unless i charge it.

Stammis said:
Well the problem is that i cannot drain the battery since it shuts down at 15% and wont let me turn it on again unless i charge it.
Click to expand...
Click to collapse
Leave it for 24 hours or more after it shuts off without charging it.

sbdags said:
Leave it for 24 hours or more after it shuts off without charging it.
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Click to collapse
Thx but it did not work , i left it alone for 20 hours after it shut it self down though, do you belive it will make a differens if i leave it alone longer at this point?

sbdags said:
Leave it for 24 hours or more after it shuts off without charging it.
Click to expand...
Click to collapse
Left it alone for three days this time, went to zero

sbdags said:
Leave it for 24 hours or more after it shuts off without charging it.
Click to expand...
Click to collapse
Hello again, apparently the fix only lasted for a few days because it shuts down again this time at 14%, so I still recive the low battery warning.