Database Users

Strange issue with battery charge

I have had my Nexus 7 for a week. First two charges went well. On the first one I plugged it when it had 5% battery left, and on second charge I plugged it around 10%.
However, two days ago I was reading something in Google Currents when the message reminding me that only 15% battery was left appeared. I kept reading for a few minutes (2 or 3 at most) and suddenly the "Power off" window appeared and the tablet shut itself down and wouldn't turn on again.
Immediately I plugged the charger, and after a few seconds it let me turn it on again. It said the battery was at 14%. At that moment I unplugged the charger again to see what happened, and the "power off" message appeared as soon as I unplugged the charger. Looking at the battery graph, at the moment I unplugged the charger the graph jumps from 14% to 0% instantly.
This time I let it fully charge while turned off, and the next day I tried to reproduce the problem. As soon as it reached 15%, the "low battery" warning appeared, and in a half second, before I could reach for the charger, the "power off" message appeared over it and the damn thing turned itself off again. It seems to me more like a software problem than a real battery problem.
I've been reading about people who had similar issues on another thread, but there was no solution. Has someone found a way to solve the problem? or you just exchanged it for a new tablet?
Thanks in advance!

Are you running stock out of the box or rooted?
You need to run about three full cycles through it, that means connect the charger and do not disconnect it until its fully charged. I would then unplug it, play around for two minutes, then plug it in again for about 20 to 30 minutes. Only do this bump charging when you completely charge it the first time.
After that initial charge and connecting it to top it off (bump charging) just use the tablet as you normally do until it dies.
Then connect it to the charger when you can allow it to completely charge to full.
If you're stock, either before the above steps or afterwards, use wugs toolkit and reset the stock image. Connect the nexus to your computer, copy the sdcard folder to your computer so everything on the sdcard storage partition is backed up, then install the stock image again which will wipe and reset the tablet.
From the information you gave I think its real likely that's a software problem and resetting will fix it. You can even try a factory reset in settings before you reflash the software.
Let us know the outcome.
Sent from my Nexus 7 using xda premium

CharliesTheMan said:
Are you running stock out of the box or rooted?
You need to run about three full cycles through it, that means connect the charger and do not disconnect it until its fully charged. I would then unplug it, play around for two minutes, then plug it in again for about 20 to 30 minutes. Only do this bump charging when you completely charge it the first time.
After that initial charge and connecting it to top it off (bump charging) just use the tablet as you normally do until it dies.
Then connect it to the charger when you can allow it to completely charge to full.
If you're stock, either before the above steps or afterwards, use wugs toolkit and reset the stock image. Connect the nexus to your computer, copy the sdcard folder to your computer so everything on the sdcard storage partition is backed up, then install the stock image again which will wipe and reset the tablet.
From the information you gave I think its real likely that's a software problem and resetting will fix it. You can even try a factory reset in settings before you reflash the software.
Let us know the outcome.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
I'm using stock, unrooted. I have not done anything a "normal" user wouldn't do. These first days I've been using it actively around 5 hours/day (i'm on holidays ) and I didn't turn it off until this problem appeared. I've charged it 10 times by now, and always made sure it was full before unplugging it. I have not tried the "bump charging" tho... I'll try it and report back
Thanks!

After bump charging it I allowed it to go down to 10% without problems. I hope it keeps running well now!

Battery on 0% charge

Hi forum .. I have a serious problem with Nexus 7
From today my tablet is on 0% battery charge with " uknown " description ... how I can do? I dont want to go to Asus Service!

hideto000 said:
Hi forum .. I have a serious problem with Nexus 7
From today my tablet is on 0% battery charge with " uknown " description ... how I can do? I dont want to go to Asus Service!
Click to expand...
Click to collapse
get into recovery and try a cache wipe to start. if that doesn't work, do a factory reset. have you backed up your apps or anything? doing a factory reset will wipe your data and you'll lose all apps, settings, everything, but it will take the tab back to "out-of-the-box" setup.

jsauder2 said:
get into recovery and try a cache wipe to start. if that doesn't work, do a factory reset. have you backed up your apps or anything? doing a factory reset will wipe your data and you'll lose all apps, settings, everything, but it will take the tab back to "out-of-the-box" setup.
Click to expand...
Click to collapse
yeah I've tried also with re-flashing the stock rom but the charge is also at 0% ... how I can do?

Are you charging USB or ac?
Sent from my Grouper

Sveke said:
Are you charging USB or ac?
Sent from my Grouper
Click to expand...
Click to collapse
Tried in AC and USB .. with the stock charger and a samsung charger... I am the only one with this problem? I dont know if is software or hardware problem

hideto000 said:
Tried in AC and USB .. with the stock charger and a samsung charger... I am the only one with this problem? I dont know if is software or hardware problem
Click to expand...
Click to collapse
What happened to cause this? Did you let it drain down to zero? Did it go from 50% to 0% at once?
More details please on what led you to this point.
Sent from my Grouper

Sveke said:
What happened to cause this? Did you let it drain down to zero? Did it go from 50% to 0% at once?
More details please on what led you to this point.
Sent from my Grouper
Click to expand...
Click to collapse
battery was at 13% ... tried to start the recovery mode ( I want to root the nexus ) Nothing happened... so I've tried to turn on tablet and..tadà! 0% battery...Now is turned on via usb cable,but it still 0% charge with " unknown " type of charge

hideto000 said:
battery was at 13% ... tried to start the recovery mode ( I want to root the nexus ) Nothing happened... so I've tried to turn on tablet and..tadà! 0% battery...Now is turned on via usb cable,but it still 0% charge with " unknown " type of charge
Click to expand...
Click to collapse
Plug into wall charger, turn tablet off, let it charge for an hour and see if it boots back up.
Not USB, to weak.
And......you really should know better then to root and do intensive tasks with 13% battery. Just saying.
Sent from my Grouper

Sveke said:
Plug into wall charger, turn tablet off, let it charge for an hour and see if it boots back up.
Not USB, to weak.
Sent from my Grouper
Click to expand...
Click to collapse
also tried! not 1 percent up from 3 hours

Hmmm....not sure what to say then. Sorry.
Sent from my Grouper

anyone have solved this problem ?

someone help me :/

Factory reset if you haven't tried that, leave to charge for a few hours, dunno how this happened
Sent from my Nexus 7 using xda app-developers app

warrant replacement. call where you got it(google play, asus, other) and get a replacement. its a known issue. i had my replaced last month(google play store) because it stopped charging. they didnt give me a hastle, and sent a replacement out fast.

Have the same problem, battery is working good but looks likes battery sensor malfunction, so system doesn't know battery status!.
Don't know what is the effect of that for the battery life!.
Tried every thing to fix that.
Any way, the only solution is RMA, already called Google, and they agreed for a replacement.
So, don't wait, you got 15 days since you got it for a replacement.
Sent from my Nexus 7 using Tapatalk HD

MAJED.y said:
Have the same problem, battery is working good but looks likes battery sensor malfunction, so system doesn't know battery status!.
Don't know what is the effect of that for the battery life!.
Tried every thing to fix that.
Any way, the only solution is RMA, already called Google, and they agreed for a replacement.
So, don't wait, you got 15 days since you got it for a replacement.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
I had this problem when I had the latest bootloader installed on my device, everytime I tried to charge it from (what it thought was) 0% the tablet would turn on and instantly turn off again because it had 0%.
I somehow managed to get it into fastboot and loaded the older bootloader (the one which won't let you into recovery without being connected to USB) and the tablet began to charge without turning itself on!
I left it to charge for about 2 hours, turned it on and it had enough juice in it to stay turned on and charge the rest of the way to 100%.
Not sure what the reason / cause of this was, my battery was at about 10% before it happened and it suddenly depleted to 0%!
Hope this helps!
Sent from my Nexus 4 using Tapatalk 2

StuMcBill said:
I had this problem when I had the latest bootloader installed on my device, everytime I tried to charge it from (what it thought was) 0% the tablet would turn on and instantly turn off again because it had 0%.
I somehow managed to get it into fastboot and loaded the older bootloader (the one which won't let you into recovery without being connected to USB) and the tablet began to charge without turning itself on!
I left it to charge for about 2 hours, turned it on and it had enough juice in it to stay turned on and charge the rest of the way to 100%.
Not sure what the reason / cause of this was, my battery was at about 10% before it happened and it suddenly depleted to 0%!
Hope this helps!
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
can you link the original bootloader you have used?

Factory reset just wipes data.. probably not his data
Sent from my Holiday using xda app-developers app

StuMcBill said:
I had this problem when I had the latest bootloader installed on my device, everytime I tried to charge it from (what it thought was) 0% the tablet would turn on and instantly turn off again because it had 0%.
I somehow managed to get it into fastboot and loaded the older bootloader (the one which won't let you into recovery without being connected to USB) and the tablet began to charge without turning itself on!
I left it to charge for about 2 hours, turned it on and it had enough juice in it to stay turned on and charge the rest of the way to 100%.
Not sure what the reason / cause of this was, my battery was at about 10% before it happened and it suddenly depleted to 0%!
Hope this helps!
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
my situation is different here, like this, I got my shipment at work, open the box, turned on the device, it's like 40%.
test it then put on the table for charge, take a look was in 98%..... after half hour it's 0% with on red battery icon.
Now sometimes battery work and I can see the "xx%", sometimes it stayed at 61% for 1 hour of use then jump to 42%!!
Sure something wrong with the battery sensor!.

This is a classic example what happens when people don't take the time to educate themselves on rooting their device. Anyone who owns a nexus device should know where to find factory images for both old and new firmware. And I always charge via USB and not AC. AC overheats my battery way too much. It can cause serious damage to your device.
Just saying

Battery stuck at 0%, won't charge

So here's my story.
I was using my tablet like normal, and the battery level was around 90%, when suddenly the battery level drops to 0% and my tablet dies. I always charge it every night, and I've never had any issues before, so I figured it couldn't be a battery issue, and I've NEVER had a battery just suddenly die on me before.
When it's plugged in, it shows the battery at 0% and charging, but it never goes above 0%. It works just fine plugged in, but as soon as I unplug it, it says Connect Charger, Power Off... Shutting Down.
But here's the weird thing! I know it can't be the battery, because when I start it up in the bootloader and it's not plugged in, it's absolutely fine! It can run hours at a time without being plugged in at the bootloader screen. But as soon as I start up the system, it gets to the X loading screen, then shuts down.
I tried flashing back to stock everything. Stock 4.2.2, stock 4.3. Nothing works.
Any ideas before I send it back to Google for repairs? :crying:

Geodude074 said:
So here's my story.
I was using my tablet like normal, and the battery level was around 90%, when suddenly the battery level drops to 0% and my tablet dies. I always charge it every night, and I've never had any issues before, so I figured it couldn't be a battery issue, and I've NEVER had a battery just suddenly die on me before.
When it's plugged in, it shows the battery at 0% and charging, but it never goes above 0%. It works just fine plugged in, but as soon as I unplug it, it says Connect Charger, Power Off... Shutting Down.
But here's the weird thing! I know it can't be the battery, because when I start it up in the bootloader and it's not plugged in, it's absolutely fine! It can run hours at a time without being plugged in at the bootloader screen. But as soon as I start up the system, it gets to the X loading screen, then shuts down.
I tried flashing back to stock everything. Stock 4.2.2, stock 4.3. Nothing works.
Any ideas before I send it back to Google for repairs? :crying:
Click to expand...
Click to collapse
How did you try to go back to stock?
Sent from my Galaxy Nexus using XDA Premium HD app

Geodude074 said:
So here's my story.
I was using my tablet like normal, and the battery level was around 90%, when suddenly the battery level drops to 0% and my tablet dies. I always charge it every night, and I've never had any issues before, so I figured it couldn't be a battery issue, and I've NEVER had a battery just suddenly die on me before.
When it's plugged in, it shows the battery at 0% and charging, but it never goes above 0%. It works just fine plugged in, but as soon as I unplug it, it says Connect Charger, Power Off... Shutting Down.
But here's the weird thing! I know it can't be the battery, because when I start it up in the bootloader and it's not plugged in, it's absolutely fine! It can run hours at a time without being plugged in at the bootloader screen. But as soon as I start up the system, it gets to the X loading screen, then shuts down.
I tried flashing back to stock everything. Stock 4.2.2, stock 4.3. Nothing works.
Any ideas before I send it back to Google for repairs? :crying:
Click to expand...
Click to collapse
Did you do full wipe when you flash back to stock ROM?
I believe I have experienced once similar to yours. Not sure how I did it but I think it is "rest for awhile" (5 min), e.g. charge with power off, unplug USB cable, wait a few minutes and turn it on.

mrgnex said:
How did you try to go back to stock?
Sent from my Galaxy Nexus using XDA Premium HD app
Click to expand...
Click to collapse
I downloaded the stock images from the Google site and ran the .bat file.
tingtan said:
Did you do full wipe when you flash back to stock ROM?
I believe I have experienced once similar to yours. Not sure how I did it but I think it is "rest for awhile" (5 min), e.g. charge with power off, unplug USB cable, wait a few minutes and turn it on.
Click to expand...
Click to collapse
Yes, everything was wiped out. I let it charge overnight and now it's stuck at 7%.
Anyways, I'm sending it back to Google.

weird, mines doing the same thing as of tonight! 0%, doesnt charge.

Which recovery are you using?
Sent from my Nexus 4 using Tapatalk 4

[Q] Nexus 7 (2012) battery issue

Hi, I bought N7 (2012) 16 GB in December 2013 and suddenly it's charging went slow. At times, it just charges 5% after plugging in for 5-6 hours. I've no idea what's happening with it. Any clue?

Same here.
E.g. last night I turned it off at appr. 30%, plugged in the charger and in den morning it was at about 50%.
I am on PACman Rom 22.1.0

there has many issues about fast battery drain after kitkat especially about N7. There is no definite fix for this but you can try not to let it decharge under %30-35 because the lower battery is the longer it charges.. good luck with pluging and unpluging the charger a few times in out in out , it helps they said.

hagizma said:
there has many issues about fast battery drain after kitkat especially about N7. There is no definite fix for this but you can try not to let it decharge under %30-35 because the lower battery is the longer it charges.. good luck with pluging and unpluging the charger a few times in out in out , it helps they said.
Click to expand...
Click to collapse
No, my case is something else. Everything was working fine and this problem happened suddenly one day. At times, while charger is plugged in, if I play game, battery starts to drain even when it's charging. There has to be some problem with the battery but I ask why did this happen and that too suddenly.

Get gsam from play store and see what's eating your battery. Or post screens here.
If you're rooted, you need gsam root companion as well. Shows more details then.
Otherwise we're all just guessing.

Mine started doing that just yesterday. I updated twrp today and did a wipe of everything, went to reboot, now it will not turn on at all. Won't even charge. I got it to turn on finally but it won't go back into recovery. Just gets stuck on the part when you first turn it on.
Sent from my SM-N900P using Tapatalk

Here's something crazy! I unplugged the battery for a few hours, plugged in the power cable, tried turning it on (didn't work for obvious reasons lol), then plugged the battery pack in. Now it's charging fine and was able to boot into recovery.
Sent from my SM-N900P using Tapatalk

[Q] Possible fix for my Nexus 4?

Here is my problem. I have a Nexus 4 that constantly powers off. And by power off, I mean as soon as the Nexus 4 boots up into the OS, the phone starts the power off sequence.
What I've tried so far was:
- in recovery did a factory reset, wiped both the data and cache partition.
- tried reloading the official nexus 4 firmware. Tried the 4.4.4 and 4.4.3 image
- used fastboot to load up a custom recover only to realize there is no rom on the phone itself to install from so that's out of the question pretty much.
- I tried the adb sideload but the computer doesn't see the nexus 4. the computer however sees the phone when it boots into the OS but the phone starts the shutdown operation as soon as it loads the start screen.
If it's hardware issue, then I guess there's no point in trying to fix it. But if it's only software related I want to at least try to see if it can be saved. lol
Any suggestions?

Well I know this happens when you have 0% battery
maybe your battery isn't charging?

Try booting with your N4 plugged and leave it plugged so 5 minutes, check your battery status and if it's ok unplug it and cross your fingers.

Roastmeat said:
Well I know this happens when you have 0% battery
maybe your battery isn't charging?
Click to expand...
Click to collapse
I thought about that at first. but according to twrp the battery life was above 70% and can run on battery perfectly fine. The phone doesn't actually belong to me. She gave up trying to fix her problem and got a new phone. I just got curious and want to find out what is causing the issue.
danmen2 said:
Try booting with your N4 plugged and leave it plugged so 5 minutes, check your battery status and if it's ok unplug it and cross your fingers.
Click to expand...
Click to collapse
I left the battery charging all of last night just to try it regardless of what the status said. It was hovering at around 70-80% according to TWRP before I plugged it in. It actually made progress today. The phone booted up. So I put in LPV just for the fun of it. The first time it booted up into LPV, it was doing the shut down process as well. Plugged it back into the wall for 5 mins, unplugged it and turned on like normal. Went through the set up process.
Left it sitting there for about an hour. Then decided to shut down the phone and restart it to see if that issue would return. Didn't return until Play Store started doing updates. The phone shut down. Powered it back up and it was fine. lol. Battery life right now is sitting at 78% and battery widget reborn is saying the temperature is 39C. So it coule very well be the battery. But my friend said the guy she brought the phone for repairs supposedly changed the battery. lol. So I don't know.

Espada04 said:
I left the battery charging all of last night just to try it regardless of what the status said. It was hovering at around 70-80% according to TWRP before I plugged it in. It actually made progress today. The phone booted up. So I put in LPV just for the fun of it. The first time it booted up into LPV, it was doing the shut down process as well. Plugged it back into the wall for 5 mins, unplugged it and turned on like normal. Went through the set up process.
Left it sitting there for about an hour. Then decided to shut down the phone and restart it to see if that issue would return. Didn't return until Play Store started doing updates. The phone shut down. Powered it back up and it was fine. lol. Battery life right now is sitting at 78% and battery widget reborn is saying the temperature is 39C. So it coule very well be the battery. But my friend said the guy she brought the phone for repairs supposedly changed the battery. lol. So I don't know.
Click to expand...
Click to collapse
Yeah, sounds like a possible bad repair. Try another thing, flash a kernel not based on stock, like hell's doctor or hell's core. After 4.4.4 there are several issues like boot loops and shutdowns with kernels based on stock.

danmen2 said:
Yeah, sounds like a possible bad repair. Try another thing, flash a kernel not based on stock, like hell's doctor or hell's core. After 4.4.4 there are several issues like boot loops and shutdowns with kernels based on stock.
Click to expand...
Click to collapse
Well it's running Android L Preview port so it's not running 4.4.4 based rom. At least to my knowledge. I'm going to see how long this last. I suspect they didn't really replace the battery or it could be an issue on the motherboard side not detecting the proper charge level on the battery? But battery life so far on the phone seems pretty crappy. 13% in the last 45 minutes on airplane mode with wifi on.