Related
Hi,
My battery info screen is always showing 0% - Unknown. I´ve tried different charging options but with no success.
The battery is charging and when I connect the Nexus 7 to the adapter/pc is says charging - 0% when locked.
Any help is appreciated.
Thanks
Had the same problem. It was not ROM specific. Even though the reading said 0 it was still charging normally (as far as I could tell).
I called Google (I bought my Nexus 7 from the Play Store) and they replaced it. I think that the battery sensor was bad.
Sent from my LG-P999 using xda app-developers app
Charge your battery to 100 percent, for the best that you can assume as 100 percent - about 3 hours, - and then run this program https://play.google.com/store/apps/details?id=com.nema.batterycalibration root required
Sent from my rooted Nexus 7 via xda-developers app.
MrSchroeder said:
Charge your battery to 100 percent, for the best that you can assume as 100 percent - about 3 hours, - and then run this program https://play.google.com/store/apps/details?id=com.nema.batterycalibration root required
Sent from my rooted Nexus 7 via xda-developers app.
Click to expand...
Click to collapse
wouldnt wiping battery info from CWM do the same thing?
hhwong said:
wouldnt wiping battery info from CWM do the same thing?
Click to expand...
Click to collapse
OP did not explain if they were rooted or not.
Sent from my rooted Nexus 7 via xda-developers app.
Reflash kernel
Just to let everyone know I tried both that app and clearing battery sats in CWM, neither did anything. I even ran it dead and then fully charged with no change. The OP may have a different problem but in my case I definitely think it was a hardware sensor issue.
Sent from my LG-P999 using xda app-developers app
Um, weird, I came home after leaving my tablet on my desk all day at home, with about 35% battery.
It was dead. Like really dead. Dead dead. I don't know if it should've run down 35% totally idle; I'd left it for 3 days before without a problem.
Now when I plugged it in, it turned straight on. Google Screen -> Lock Screen. No colored X.
Showed 0% for 10 minutes. The battery graph was especially weird. For one thing, it had locked the stats and showed as still on battery basically. For another, it showed going from the low end of green to instantly dropping to 0%, red. Unplugged it, and it died instantly.
I'm letting it charge now with it off. Quick power button press shows the charging indicator thing.
I actually have an RMA out for this one for the touch screen issues, so it doesn't matter, but still... weird.
battery sensor/calibration issues
Old thread but I thought I'd add to it for other people with the same problem.
I have basically have the same issue on a stock, rooted 16GB Nexus 7. It's highly intermittent.
It first reared it's head about a month after I got the device (in Aug 2012), on the original firmware. My nexus 7 wouldn't (appear to) charge past 25% and would shut itself off after being on for only a few hours. I spent a day trying to fix it, including wiping the device, but nothing worked. Then magically, a few days later, the problem was gone.
The Nexus 7 worked fine for another month or so and then one day, after having charged it for several hours, I noticed that it was reporting a 0% charge. (Firmware was still stock but had been updated) This time it didn't power off, it just misreported it's charge. I could still run it for 10 hours or so, even though it said that it had a 0% charge and that I should connect the charger. I tried the "battery calibrator" mentioned in this thread which didn't seem to work but the next day, the device reported it had a charge. It's been randomly fluctuating between reporting 0% and a having charge every since. Sometimes it works fine for several days but then it will say 0% again.
It hasn't really affected my use of the device but it can be inconvenient not knowing how much charge you have left. Today I finally called Google and explained the problem and they promptly offered to exchange it. Hopefully this is not a design flaw but a faulty component from bad batch..
There's more than a good bit of bad advice in this thread. That anyone would waste people's time by recommending a ”battery calibration” app or to wipe battery stats is disheartening, as it is widely known that they have no correlation to battery indication.
More often than not, it seems, this problem with the N7 involves the battery connector not being properly seated.
Sent from my Nexus 7 using Tapatalk HD
I'm also having a similar problem, though when my nexus 7 completely dies from the battery I plug in and right away power back up and when it comes to the home screen with 0-1% charge it right away powers down. I tried leaving it off while pluged in let it charge for 5 mins and then power back up again till I see it have a minimum amount of charge, it seems to work not sure if its ROM or kernel related, I'll keep an eye on it.
There's a helpful article that seems to help other nexus 7 users, hope this helps
http://www.droid-life.com/2012/12/27/fix-nexus-7-refusing-to-charge-try-this-trick/
Via Galaxy Nexus [LTE]
I have the same problem with my nexus 7 3g.
Factory reset does not help.
Finally open the back cover (quite easy) and found that the battery cable connector is loose. So I tightened and my tablet is well again.
Hope this help.
Yeah what worked for me was to also unplug my battery. Seemed to correct itself after that. Mine would shut off showing a charge of 60%.
dudung0 said:
I have the same problem with my nexus 7 3g.
Factory reset does not help.
Finally open the back cover (quite easy) and found that the battery cable connector is loose. So I tightened and my tablet is well again.
Hope this help.
Click to expand...
Click to collapse
Does the back just unsnap like a regular battery door?
I have issues sometimes. Like the other night it charged all night and when I woke up it was fine, turn off the alarm on it and had breakfast. Came back and it wouldn't come on. Tried all I could without taking it apart. Ended up removing the back cover, unplugging the battery for ten seconds and then it worked fine. Battery was at 100% once it booted up.
---------- Post added at 08:07 AM ---------- Previous post was at 08:07 AM ----------
atistang said:
Does the back just unsnap like a regular battery door?
Click to expand...
Click to collapse
Use your fingernail to get between it and the chassis. It pops off pretty easy. Just be careful. I'm sure YouTube has a few videos showing it.
atistang said:
Does the back just unsnap like a regular battery door?
Click to expand...
Click to collapse
search for ifixit+nexus+7+battery
You can use your fingernail.
Nexus 7 - Battery 0% Unkown.
dudung0 said:
I have the same problem with my nexus 7 3g.
Factory reset does not help.
Finally open the back cover (quite easy) and found that the battery cable connector is loose. So I tightened and my tablet is well again.
Hope this help.
Click to expand...
Click to collapse
Hi.. I Have the same model and I had the same problem...
I made the turn off method (https://plus.google.com/+DerekRoss/posts/563EVVEPMDS) and did not work...
I rooted my Nexus to calibrate the Battery (http://forum.xda-developers.com/showthread.php?t=1838429) and did not work.
But the in my case the most simple solution works : Unplug /plug the Battery (http://productforums.google.com/forum/#!msg/mobile/Knrn4DThksg/ovuWYHUytZ0J).
Show this video about how to do it:
http://www.youtube.com/watch?v=bjh0H6SZHRM&list=PLBGUp1nK51h0Zyb2wIJjIhtTVQKyfj4BB&feature=mh_lolz
I hope have luck
bye.
hello guys, i had recently bought a nexus 7 16gb about a month ago, and while i was gone for the weekend, my little sister was using it. When i returned, she said it had completely died and she had been charging all night but was still at 0%. I've tried the common fixes that everyone has tried, but for some reason my battery says it will not charge, but yet i left it on the charged for over 6 hours and its still at 0%. When i got to Settings > Battery > it has been unplugged for well over 18 hours. is there any fixes out there or any way to reset the battery stats? i'm on 4.1.2/ stock non-rooted. can post screenshots if needed. i dont want to keep charging and risk overcharging my battery or anything like that. It doesnt get hot, make any weird noises or anything. Thank you in advance!
I think you have loose battery connector.
and please post questions in Q&A section (xda made it for a reason)
stupid4life6 said:
hello guys, i had recently bought a nexus 7 16gb about a month ago, and while i was gone for the weekend, my little sister was using it. When i returned, she said it had completely died and she had been charging all night but was still at 0%. I've tried the common fixes that everyone has tried, but for some reason my battery says it will not charge, but yet i left it on the charged for over 6 hours and its still at 0%. When i got to Settings > Battery > it has been unplugged for well over 18 hours. is there any fixes out there or any way to reset the battery stats? i'm on 4.1.2/ stock non-rooted. can post screenshots if needed. i dont want to keep charging and risk overcharging my battery or anything like that. It doesnt get hot, make any weird noises or anything. Thank you in advance!
Click to expand...
Click to collapse
Sounds like a loose connection in the battery.
If you dare, pop the back open and then check the flex cable.
When she said that 'it has completely died', did she mean it just randomly went off when she was using it and the battery level wasn't empty, or did she mean that she had got the 4% warning and kept using it until it died? This is important.
If it was the former, then yes, the battery connector may have come out. If it was the latter, it's very unlikely its anything to do with the connector. I'm sure I've seen something before about a problem when someone has used it until it has completely ran out of charge until it switched off.
Sent from my Nexus 7 using tapatalk 2. (Gone off HD...)
stupid4life6 said:
hello guys, i had recently bought a nexus 7 16gb about a month ago, and while i was gone for the weekend, my little sister was using it. When i returned, she said it had completely died and she had been charging all night but was still at 0%. I've tried the common fixes that everyone has tried, but for some reason my battery says it will not charge, but yet i left it on the charged for over 6 hours and its still at 0%. When i got to Settings > Battery > it has been unplugged for well over 18 hours. is there any fixes out there or any way to reset the battery stats? i'm on 4.1.2/ stock non-rooted. can post screenshots if needed. i dont want to keep charging and risk overcharging my battery or anything like that. It doesnt get hot, make any weird noises or anything. Thank you in advance!
Click to expand...
Click to collapse
Ask her by the scruff of neck, did you drop my n7. If she say's yes, either send in for repair using your warranty or pop off the back. Since it is recently bought - probably better to use the warranty...
thank you guys for the replys, i dont think its a loose battery connector, i popped the back off and everything seems to be okay, i let it charge for like 8 hours and then have been playing with it for about 9 hours now, its what it says in the settings, but it still says the battery has 0%, but its functioning just fine..? idk, its pretty weird but its running completely normal..
knuckles1978 said:
When she said that 'it has completely died', did she mean it just randomly went off when she was using it and the battery level wasn't empty, or did she mean that she had got the 4% warning and kept using it until it died? This is important.
If it was the former, then yes, the battery connector may have come out. If it was the latter, it's very unlikely its anything to do with the connector. I'm sure I've seen something before about a problem when someone has used it until it has completely ran out of charge until it switched off.
Sent from my Nexus 7 using tapatalk 2. (Gone off HD...)
Click to expand...
Click to collapse
yes she said she play stupid temple run until it was completely dead, then didnt charge it until a couple hours before i got home and she said it read 0% the whole time it was charging
Your charger might not be putting out 5volts
Sent from my Nexus 7 using xda app-developers app
thank you xateeq, Wilks3y, and knuckles, it was just a loose cable. Also, when i had the back off, i noticed there was 4 soft buttons but only three that are pressable (power, vol up and vol down). did they have plans to make a camera shortcut perhaps? also, i realized there were two screws that are missing out of the holes. is that a normal mishap on their behalf? thanks for the answers guys, just a little curious.
stupid4life6 said:
there were two screws that are missing out of the holes. is that a normal mishap on their behalf? thanks for the answers guys, just a little curious.
Click to expand...
Click to collapse
Yes, that's normal, because they caused the screen lift in the first parties of N7, and without them the issue seems to have been resolved
stupid4life6 said:
thank you xateeq, Wilks3y, and knuckles, it was just a loose cable. Also, when i had the back off, i noticed there was 4 soft buttons but only three that are pressable (power, vol up and vol down). did they have plans to make a camera shortcut perhaps? also, i realized there were two screws that are missing out of the holes. is that a normal mishap on their behalf? thanks for the answers guys, just a little curious.
Click to expand...
Click to collapse
Yeah when you had the back off you would have seen the empty square bit where there was originally going to be a rear camera, before Google told asus to take it out of the design. Sure someone from the modding community will be working on that.... In fact i saw a thread where they found out what camera was going to be in there, and they were in the process of trying to get it in and working...
Sent from my Nexus 7 using tapatalk 2. (Gone off HD...)
For the love of god i can't understand why my Nexus 4 battery is draining while it's off! Sometimes i use my iphone 5 , and always charge the Nexus 4 in case i wanna use it,i know it's already charge. 2 days ago i let the Nexus 4 completely charge, today i power up the phone and the battery was at 14%. It happened a couple times but was always thought ah maybe i left it on or something, this time i made sure the phone was off, but battery still drains... Im on stock rom never rooted, using Nexus 7 charger... Any idea on what could be the problem?? Thx in advance!
Sent from my iPad 4G
Maybe a bad battery?
Sent from my SCH-I605 using Tapatalk 2
I mean i don't have battery problem at all when i'm using it.... It's just when the phone is not in use and off it's still drains battery like it was on... I can understand something like that happening if the phone was off for a long period of time but 2 days 14% left while off seems ridiculous!
Sent from my iPad 4G
Try using the same cable and charger. Make sure Facebook isn't running or any apps that can drain your battery. Facebook killed my battery with no data connection
Sent from my Nexus 4 using xda premium
I just sent my first Nexus 4 in for RMA on this very issue, got the replacement on Friday, did a charge cycle, charged the phone fully up whilst off, took it off the charger (the official Nexus charger btw), and let it sit for the last day, just turned it on, and it's at 60%.... W T F !!!
This is sooo totally bizarre! I can only assume that this is common to most Nexus 4 (what are the odds of me getting two bad ones - direct from Google - with the exact the same issue?), and that people just aren't noticing, as most people don't leave their phones off after fully charging, and thus just never notice, as the battery behaves perfectly normally under usual use.
I would gratefully appreciate it if people could put this to the test, so I know whether or not to RMA the second device or not....
Was the phone powered down, or just sleeping? Any programs set to auto sync? Check for wakelocks?
Sent from my Nexus 4 using xda app-developers app
Did you use the same charger with both phones?
Sent from my Nexus 4
hello,
i'm using a galaxy s4 since 3 months now but i have a problem since this week.
my phone looses signal at some point. nothing that i know that can cause it. it doenst turn back when activating airplane mode and then deactivating this mode.
and when i turn of the phone it turns on to the standard galaxy S4 logo and then samsung logo but then it just dies.
i have to connect it to a charger and then it works.
also my phone doenst give an announcement when my battery is emptY. it sometimes displays 15% on battery and then it dies. when charging the battery icon displays and the battery is completly empty?
i looked at my battery and it is a little bit swollen and i only use official charger at night from samsung and during the day one of nokia
anyone else with this problem?
I had the same issue. My battery was also swollen.
Replacing my battery solved the problem. At least till now (fingers crossed)
nielsvg said:
hello,
i'm using a galaxy s4 since 3 months now but i have a problem since this week.
my phone looses signal at some point. nothing that i know that can cause it. it doenst turn back when activating airplane mode and then deactivating this mode.
and when i turn of the phone it turns on to the standard galaxy S4 logo and then samsung logo but then it just dies.
i have to connect it to a charger and then it works.
also my phone doenst give an announcement when my battery is emptY. it sometimes displays 15% on battery and then it dies. when charging the battery icon displays and the battery is completly empty?
i looked at my battery and it is a little bit swollen and i only use official charger at night from samsung and during the day one of nokia
anyone else with this problem?
Click to expand...
Click to collapse
Exact same issue here. Replaced the swollen battery with a new one and its working as usual again.
Strange that original battery lived only a few months.
Sent from my GT-I9505 using xda app-developers app
Same problem with my phone. My warranty cover battery 6 months and tomorrow I'm going to service and I''ll ask them about this problem. I'll share info here
jefff said:
Same problem with my phone. My warranty cover battery 6 months and tomorrow I'm going to service and I''ll ask them about this problem. I'll share info here
Click to expand...
Click to collapse
Willing to see the result.
Cheers.
Also somewhat swollen. Started expanding slowly untill the battery was dead. I have the 9500.
My battery goes down pretty quick when on LTE.
Sent from my GT-I9505 using XDA Premium 4 mobile app
MaKTaiL said:
My battery goes down pretty quick when on LTE.
Sent from my GT-I9505 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Unless you have a goof full LTE connection, expect that. Lte and battery do not get along with each other.
Sent from my GT-I9505G using Tapatalk 4
occupational_hazard said:
Unless you have a goof full LTE connection, expect that. Lte and battery do not get along with each other.
Sent from my GT-I9505G using Tapatalk 4
Click to expand...
Click to collapse
I´m experience that too. My battery is going slowly... Every new charge theems the phone lasts less... Battery issue?
I have experienced this during my Galaxy W days. And samsungs centre's technician told me it's because I charge my phone while using it for hours, and it's straining the battery causing the gradual swell. Since then I never plug my phone while using it and until now my s4's battery is still good as new. My phone's 4 months old already.
FYI.
gyxter said:
I have experienced this during my Galaxy W days. And samsungs centre's technician told me it's because I charge my phone while using it for hours, and it's straining the battery causing the gradual swell. Since then I never plug my phone while using it and until now my s4's battery is still good as new. My phone's 4 months old already.
FYI.
Click to expand...
Click to collapse
I allways charge it overnight. And own many galaxy devices and none has this issue.
Sent from my GT-I9505G using xda premium
gyxter said:
I have experienced this during my Galaxy W days. And samsungs centre's technician told me it's because I charge my phone while using it for hours, and it's straining the battery causing the gradual swell. Since then I never plug my phone while using it and until now my s4's battery is still good as new. My phone's 4 months old already.
FYI.
Click to expand...
Click to collapse
I'm sorry but this doesn't make any sense to me. Maybe it's Samsung's was of "diverting" the fault to the user. The battery should not swell because you're using it while charging. I've never had this issue with with my other phone, which had a very small battery by design and had to stay plugged in if I were to get any real use out of it. Over charging does gradually reduce battery life but no swelling.
I have also had this issue. Started a few days ago with random reboots and signal losses.
Has anyone taken it back to the shop? Will they want to keep the phone for testing? I just want to replace the battery and not have to send my device away for a long time. I need to know because it's rooted and if they see that the warranty will be voided. Phone is only 3 months old, this really shouldn't happen.
I think it's battery issue. Maybe Samsung spares on the battery this time... on s3 it was on memory.
I solved this issue flashing a Google edition romantic with a full wipe (formating internal sd). Take some days with this Google edition tom and battery drain stopped. This can be related to last firmware releases. Just guessing...
Google edition 1.4 by coolboy
Sent from my GT-I9505 using xda premium
Hello, :fingers-crossed:
i'm having a lot of troubles with the battery of my Nexus 4. I'll try to explain this strange situation...
Few days ago i noticed a ridicoulous battery drain while i was, as usually, listening to some music with my bluetooth A2DP headset Jabra HALO2. It was something like 1% every less then 1 minute. At first i thought it was due to a recently upgrade to CM10.2M1 (which is a monthly build of Cyanogenmod on 4.3) or due to a 5 minutes fast charge from the 2A charger of Nexus 10 that could have "upset" the battery.
At first i started focusing on the software side problem; i tried CM10.2RC1, CM10.2, stock 4.3, stock 4.4 and now CM11M1, and, while doing all of those wipes, i noticed that not only the discharge was insanely fast, but even the charge! The graph on the setting panel is almost vertical while cahrging, like 3% to 40% in 25 minutes.
But that's not all, sometimes, after rebooting, i noticed a battery level different from the previous boot, so i decided to wait a full discharge and then fully recharge it. I have waited the 0% (not so much time ) putting the screen always on and the LED flash too, then, i tried few times to turn it on and every time, after the boot screen disappeared it immediately started to turning off due to 0% battery.
Moreover, for being certain, i tried to turn it on in recovery and wait how much time it would take to consume the lasting charge on the battery. Surprisingly, after 30 minutes it was still there! I tried a reboot into system, showing me a 10% remaining battery (WTF), which discharged to 0% in like 3 minutes. Now i'm waiting the whole night the real discharge in recovery with screen always on, hoping that a full recharge could fix it. I would like to evidence that the phone do not overheat during both charghe and discharge, so i guess the battery itself may be ok.
I'm still not sure if it's a software problem, and i'm worrid if it could be an hardware related issue. Maybe it could have been the charge from the 2A adapter.
I really don't know what to do next. Someone knows how to help me?
Here 2 screenshoots, I wasn't able to upload it normally so here the links:
https://drive.google.com/file/d/0ByucdM-SwPNnMlFUOGU4bXkzaGs/edit?usp=sharing
https://drive.google.com/file/d/0ByucdM-SwPNnZEtXczNuTXhiMGc/edit?usp=sharing
EDIT:
I've done a full discharge until even the full hybernation has been shutted down, but seems that it hasn't solved anything. I've also noticed that in the battery stat is missing the display consumption (WTF?!?). Maybe it's a CM11M1 bug, it happen even to my Nexus 10. Here other shots:
https://drive.google.com/file/d/0ByucdM-SwPNnazVacUNZeEZkUlk/edit?usp=sharing
https://drive.google.com/file/d/0ByucdM-SwPNnRHU2QlJibk5TVVE/edit?usp=sharing
EDIT:
As happened to the N10, after a while the display appear in the stats:
https://drive.google.com/file/d/0ByucdM-SwPNnMEozbzNRVGdzSHc/edit?usp=sharing
EDIT:
I've noticed just now that while I was waiting a real full discharge of the battery the TWRP couldn't show me the battery percentage. Really strange...
[SOLVED]
In summary, the problem was the combination of kernel+ROM. The CM with his kernel on N4 was consuming tons of electrons. I tried Purity+Hellscore, now i reach few days of low usage and one and half of medium usage
How old is your phone? You might be able to get a replacement from Google under warranty.
Sent from my Nexus 4 using xda app-developers app
I don't think it'd be the 2A charge, I use the 2A charger on my battery all the time.
Sent from my Nexus 4 using Tapatalk
EDITed main post!
sshark said:
How old is your phone? You might be able to get a replacement from Google under warranty.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
It have 9 months, and yes is still under warrenty, but I've bought it in Spain, and I live in Italy. I think this will be hard to solve
I have some strange problemi too.
Sometines the phone reboot itself and the battery drops (i tried to flash all stock: recovery, bootloader,ROM ecc..)
It could be a faulty battery.. Read this topic, it looks like you have the same kind of problems.
Do you also have simlocks/loss of network connection?
EDITed main post!
Faeshaas said:
It could be a faulty battery.. Read this topic, it looks like you have the same kind of problems.
Do you also have simlocks/loss of network connection?
Click to expand...
Click to collapse
I've already read this topic, i think the source of the problem may be related with mine, but symptoms are different. It is strange that this happened 9 months later!
Gully discharging the phone, rebooting, discharge again if any, reboot. Connect charger, charge full. Reboot, charge full again if any, reboot. This always worked for me.
You can also try to fully discharge, completely power off the phone and let it fully charge while powered off ( only a white battery should be shown on the display).
Sent from my Nexus 4 using xda app-developers app
I'm having the same issues with my phone.
Sent from my Nexus 4 using xda app-developers app
Oxious119 said:
Gully discharging the phone, rebooting, discharge again if any, reboot. Connect charger, charge full. Reboot, charge full again if any, reboot. This always worked for me.
You can also try to fully discharge, completely power off the phone and let it fully charge while powered off ( only a white battery should be shown on the display).
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Already done, nothing....
Did all of u found the problem? Cause it seems i have the same...
Sent from my Nexus 4 using XDA Premium 4 mobile app
Amiramac said:
Did all of u found the problem? Cause it seems i have the same...
Sent from my Nexus 4 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Unfortunately, no. Probably it is a battery related problem, i'm going to replace it and see what happen. In the meantime not even PurityROM+HellsCore kernel may handle this battery draining...