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"Show low low battery logo" Nexus 7 thinks battery is dead even when fully charged!

"Show low low battery logo" Nexus 7 thinks battery is dead even when fully charged!
I have already got a replacement on order from the Play Store but since I haven't seen any reports on this after plenty of searching I figured I'd describe the issue.
My 16gb Nexus 7 worked pretty much flawlessly for the first several days of pretty light use minus very minimal flicker on occasion. As of two days ago the unit is basically unusable as it randomly but excessively decides that the battery is dead even though it is fully charged. The first several times this happened I wasn't paying attention and I thought it just shut off by itself, but then I started to watch it more closely but it also started happening more and more. As of this morning it will not stay on more than 5 minutes before it audibly notifies a low battery with the messages "Connect Charger" and "Powering down". Sometimes it will give two options "Battery" and "OK" but I was never able to actually get the buttons to respond because it would already be shutting down. Other times it will just show the connect charger and powering down messages with no buttons which is strange, but in either case the device shuts down.
Once I started troubleshooting I figured out a little more information.
Watching the lock screen while it is charging I will see it go from it's (I think) correct charge percent to 0% randomly.
While not charging it will either show a red battery indicator in the notification area or just an empty battery when it decides to shut down
Sometimes it will boot right up and be back up to regular charge level (of course just to shut down again within a few minutes)
Other times it will not boot up and I noticed the error message (almost like a debug prompt mistakenly left in the code) in the upper left corner "Show low low battery logo" + some strange symbol like when you get 100 1-Ups in Super Mario Brothers . Yes the message has the word "low" twice - I guess this is lower than standard low!
Anyway, kinda bummed but since I have not seen any other report of this particular issue I'm hopeful that the replacement will not have the same problem. I'm just hoping I don't get a unit that has some of the other problems being reported so I'm crossing my fingers.

Mine started doing the same this morning
Sent from my LT26i using xda app-developers app

This sounds pretty similar to my problem from another thread. Every time it hits 25% while discharging it dies. Normally I'd say it's just a software calibration issue and fixable by wiping battery stats, but I've wiped several times at 100% and run down to 25% and it still dies.
Do you find that you still get a normal amount of battery life before it dies? It'd help to establish whether this is the battery misreporting, or actually not discharging properly.
* Strangely this time after my N7 had died at 25% I turned it on and it's at 0% battery. It's been charging for ~15min and it still says 0%... When you all first got the device, did you let it run to 0%, or did you charge it right away?
** And now, after almost an hour, it's at 1%. Seems to be charging, but brutally slowly (and I'm using the bundled charger, not PC USB).

omnikai said:
This sounds pretty similar to my problem from another thread. Every time it hits 25% while discharging it dies. Normally I'd say it's just a software calibration issue and fixable by wiping battery stats, but I've wiped several times at 100% and run down to 25% and it still dies.
Do you find that you still get a normal amount of battery life before it dies? It'd help to establish whether this is the battery misreporting, or actually not discharging properly.
* Strangely this time after my N7 had died at 25% I turned it on and it's at 0% battery. It's been charging for ~15min and it still says 0%... When you all first got the device, did you let it run to 0%, or did you charge it right away?
** And now, after almost an hour, it's at 1%. Seems to be charging, but brutally slowly (and I'm using the bundled charger, not PC USB).
Click to expand...
Click to collapse
Yours sounds like a similar but different issue. My N7 dies regardless of how much charge it has. It can have 100% charge and within 5 minutes it will report 0% charge and die. Then when I can get it to boot again it will be back up to 99% charge again. I can't get more than 10 minutes of use before it dies regardless of how much charge it truly has.

omnikai said:
This sounds pretty similar to my problem from another thread. Every time it hits 25% while discharging it dies. Normally I'd say it's just a software calibration issue and fixable by wiping battery stats, but I've wiped several times at 100% and run down to 25% and it still dies.
Do you find that you still get a normal amount of battery life before it dies? It'd help to establish whether this is the battery misreporting, or actually not discharging properly.
* Strangely this time after my N7 had died at 25% I turned it on and it's at 0% battery. It's been charging for ~15min and it still says 0%... When you all first got the device, did you let it run to 0%, or did you charge it right away?
** And now, after almost an hour, it's at 1%. Seems to be charging, but brutally slowly (and I'm using the bundled charger, not PC USB).
Click to expand...
Click to collapse
I'm starting to have this same issue, however mine goes at about 19%. Just turns off. I have also seen the show low battery in white text thing. I have tried calibrating by fully charging then deleting batterystats.bin from data/system and letting it decharge and it still died around there, I'm recharging again to 100 to see what happens this next time I let it go... thought mine was issue free than this happens

Well in case anyone else runs into this, I have no idea what caused this or how I got out of it thinking it was dead at 20%. I tried deleting the stats, reflashed stock and then CM10 and back again, tried a different kernel, and still died at 20 and gave me the "low low battery logo".
I just took it into Gamestop where I got it and started the process for an exchange, so I have another one coming now. Go figure when I got home I plugged it back in, and now this time just like omnikai said instead of being at 20% it was at 0 when I turned it on. Been a while and now and seems to be charging normally so hopefully it will decharge fine.. either way really weird only problem I've had with mine so far
** Just wanted to edit and say its now decharging normally dont know what caused it to spazz out or fix it one of those ghost in the machine android moments

NeoMagus said:
Well in case anyone else runs into this, I have no idea what caused this or how I got out of it thinking it was dead at 20%. I tried deleting the stats, reflashed stock and then CM10 and back again, tried a different kernel, and still died at 20 and gave me the "low low battery logo".
I just took it into Gamestop where I got it and started the process for an exchange, so I have another one coming now. Go figure when I got home I plugged it back in, and now this time just like omnikai said instead of being at 20% it was at 0 when I turned it on. Been a while and now and seems to be charging normally so hopefully it will decharge fine.. either way really weird only problem I've had with mine so far
Click to expand...
Click to collapse
Replacement N7 seems to be fine thusfar...

Apparently, somebody in StackExchange is having the same issue as well:
http://android.stackexchange.com/questions/27222/nexus-7-system-error-show-low-battery-logo

if anyone else gets this, try disconnecting the battery and then re connect and see if that fixes it. i had same type of issue on viewsonic g-tab and that was the required fix.

Mine did it at 10%, calibrated the battery and im getting truly awesome battery life 2 full days without a charge
Sent from my SAMSUNG-SGH-I717 using xda premium
---------- Post added at 02:54 PM ---------- Previous post was at 02:52 PM ----------
This is the app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
You need to be rooted
Sent from my SAMSUNG-SGH-I717 using xda premium

Same problem here when battery reaches 24% whole tab dies...
Did someone fixed it?

egomezmorales said:
Mine did it at 10%, calibrated the battery and im getting truly awesome battery life 2 full days without a charge
Sent from my SAMSUNG-SGH-I717 using xda premium
---------- Post added at 02:54 PM ---------- Previous post was at 02:52 PM ----------
This is the app
https://play.google.com/store/apps/details?id=com.nema.batterycalibration
You need to be rooted
Sent from my SAMSUNG-SGH-I717 using xda premium
Click to expand...
Click to collapse
While this reply is late to the game, it needs to be pointed out that such apps are 100% snake oil and do not calibrate the battery. They are based upon gross misinformation and any dev that tells you that clearing batterystats.bin has any effect on battery life or reported battery charge clearly doesn't know how Android works.
Sent from my Galaxy Nexus using Tapatalk 2

Beekhouse said:
Same problem here when battery reaches 24% whole tab dies...
Did someone fixed it?
Click to expand...
Click to collapse
Have you fixed this yet cos mine does the same?

I had been having the same problems that everyone described: would suddenly die at 25% and wouldn't turn back on unless I gave it a charge for a bit and then held the power button down for a while.
For the last 2 weeks, I've been charging it only with the stock charger and that seems to have fixed it. Previously I would charge with any charger I had around.
Not sure if it's a permanent fix but it's working now (I've taken it down to 4% before charging it back up).

AdamK123 said:
I had been having the same problems that everyone described: would suddenly die at 25% and wouldn't turn back on unless I gave it a charge for a bit and then held the power button down for a while.
For the last 2 weeks, I've been charging it only with the stock charger and that seems to have fixed it. Previously I would charge with any charger I had around.
Not sure if it's a permanent fix but it's working now (I've taken it down to 4% before charging it back up).
Click to expand...
Click to collapse
I only use the stock charger on mine but after this happened so often I tried another one and battery charged OK but then kept blipping from say 50% to 54%, went bed with it at 49% and this morning dead again. Charged it again today on stock charger and waiting to see what happens.

Sorry all for this bump.
I just got this same issue tonight on stock, unrooted nexus 7 16gb and I only use the stock charger, I let it die through battery and then when I charged it amend turned it on, all these problems happened.
One symptom that hasn't been mentioned is that the clock is set back to January 1st 1am.
I managed to get it to start without turning off by holding the power button until the Google logo showed twice, at the moment it's on but charging.
Hope this doesn't become a problem again in the future.

NeoMagus said:
Well in case anyone else runs into this, I have no idea what caused this or how I got out of it thinking it was dead at 20%. I tried deleting the stats, reflashed stock and then CM10 and back again, tried a different kernel, and still died at 20 and gave me the "low low battery logo".
I just took it into Gamestop where I got it and started the process for an exchange, so I have another one coming now. Go figure when I got home I plugged it back in, and now this time just like omnikai said instead of being at 20% it was at 0 when I turned it on. Been a while and now and seems to be charging normally so hopefully it will decharge fine.. either way really weird only problem I've had with mine so far
** Just wanted to edit and say its now decharging normally dont know what caused it to spazz out or fix it one of those ghost in the machine android moments
Click to expand...
Click to collapse
I am currently having the 20% problem. Did your tablet reaminworking normally since the self correction?

A Probable solution to the nexus 7 dying at 15% + charge
dbstrat said:
I have already got a replacement on order from the Play Store but since I haven't seen any reports on this after plenty of searching I figured I'd describe the issue.
My 16gb Nexus 7 worked pretty much flawlessly for the first several days of pretty light use minus very minimal flicker on occasion. As of two days ago the unit is basically unusable as it randomly but excessively decides that the battery is dead even though it is fully charged. The first several times this happened I wasn't paying attention and I thought it just shut off by itself, but then I started to watch it more closely but it also started happening more and more. As of this morning it will not stay on more than 5 minutes before it audibly notifies a low battery with the messages "Connect Charger" and "Powering down". Sometimes it will give two options "Battery" and "OK" but I was never able to actually get the buttons to respond because it would already be shutting down. Other times it will just show the connect charger and powering down messages with no buttons which is strange, but in either case the device shuts down.
Once I started troubleshooting I figured out a little more information.
Watching the lock screen while it is charging I will see it go from it's (I think) correct charge percent to 0% randomly.
While not charging it will either show a red battery indicator in the notification area or just an empty battery when it decides to shut down
Sometimes it will boot right up and be back up to regular charge level (of course just to shut down again within a few minutes)
Other times it will not boot up and I noticed the error message (almost like a debug prompt mistakenly left in the code) in the upper left corner "Show low low battery logo" + some strange symbol like when you get 100 1-Ups in Super Mario Brothers . Yes the message has the word "low" twice - I guess this is lower than standard low!
Anyway, kinda bummed but since I have not seen any other report of this particular issue I'm hopeful that the replacement will not have the same problem. I'm just hoping I don't get a unit that has some of the other problems being reported so I'm crossing my fingers.
Click to expand...
Click to collapse
I recently started having the same problem with my 2 month old rooted Nexus 7 (wifi only) . It was dying at about 19% - 23% charge . Tried doing the battery recallibration at 100% charge, even wiped the device clean and flashed the Jellybean 4.2 factory image but it didn't work.
I talked with the ASUS service center guys to get it fixed, and created a sort of guest user so that I won't have to disconnect my accounts. After that my problem seems to have been fixed. I discharged it to about 4% and then put it to charge, it's charging properly now so I am hoping the problem has been fixed.
I am not sure whether this would work for everybody, but I guess it's worth a try.

N7 Turns Off/Won't Turn Back On/Battery Status Issues - The Fixes **UPDATE**...

**Update** See new note added 2/16/13 at bottom!
Trying to provide a single informational resource on three, typically related issues:
1. My N7 turns off randomly
2. My N7 dies early at ___% battery (you fill in the value)
3. My N7 turned itself off, and won't turn back on
There’s a ton of threads all over the net regarding these issues, some providing unintentionally misleading info, some progress towards actually defining the issue and posing possible solutions. Reports of these issues started back when the N7 was first released and continue to this day. These issues have been reported to Google, but who knows whether or not the Google God will attend to them anytime soon.
What follows is what I’ve learned about these issues, how they affected most users, and how they were resolved for most users. This is not intended to capture every possible exception.
Issue #1:
For some users, their N7 just turns off randomly, regardless of battery level. For them, a loose battery connector is typically the cause. Popping off the back cover, re-seating the connector and possibly putting a tiny piece of tape to keep it secured over time is the fix.
Issue #2:
Many users notice that their N7’s turn off by itself, typically when the battery is at the lower-end of the % scale – anywhere from 40% down to 20% or so. Most users think that their N7 is running out of power "early" – but it seems that the 40% - 20% indication is erroneous - the battery is really at 0%, and is turning off as it should. This appears to be the caused by a software glitch that Google has to address. Doing a Factory Reset and a battery pull appears to remedy this issue for just about everyone. Please note that a corollary to this issue is the observation that once charged, the N7 remains at 100% far longer than it should.
Issue #3:
Taken out of context, having an N7 that won’t start seems like a terrible thing. But in most cases, it’s caused by Issues #1 and #2.
- If Issue #1 caused it: reconnect the loose cable, recharge your battery if needed, and you are good-to-go.
- If #2 caused it, your N7 battery is dead. Plug your N7 into the original power supply, patiently wait a few minutes then patiently hold down the power button up to 30 seconds (actually look at your watch – it’s gotta be “up to 30 seconds”!), for just about everyone reporting, it’ll start up just fine.
- If both of these methods don't work, try powering-down via the bootloader: plug your N7 into the charger, press Volume-Down and Power at the same time, in the bootloader choose "Power-Off Device", unplug your N7 and plug it back in. Do you see the battery meter? If so, you're done.
- While the original power supply should be the best to use in these troubleshooting procedures, if you are not getting a resolution of this issue, some N7 owners have had success with power supplied by USB via PC. Give it a try.
Since these problems are widespread, there are a number of “fixes” offered other than those above, that are somewhat anecdotal – they only “work” in one/couple instances and therefore there’s no real evidence that they are relevant. This group includes:
- Using battery calibration apps to fix the problem
- Dumping battery stats
- Uninstalling a specific " troublesome" app
Some users send their N7’s back to Google, and their new N7’s are deemed "fine". A number of knowledgeable users have speculated that most of these N7’s sent back really only suffered from the fixable issues listed above. To support this notion, some have reported that the replacements have the same “defects” as their first units, and they continue to send them back.
My experience:
My N7 worked perfectly for the first two weeks of ownership. Then it started turning off at 30% and 23%. I also noted that once I charged-up, my N7 would stay at 100% forever, leading me to believe that the battery readings were hosed-up. After these problems started, it would not go below the 30%-20% thresholds. The first time I tried to power it up - it wouldn't - and I thought is had totally borked. I tried eventually figured out that I needed to add power, wait, then hold down the power button. Worked every time.
For me, I wanted to know if I had a loose battery connector - a common problem, even though my N7 was not shutting down randomly, it was always at low battery levels. I figured that I'd just do the two things that research showed would work for sure, and would cover two different issues. I popped the back off, found that the connector as well-seated, but I pulled it off anyway to do the "battery pull". I reconnected and added a bit of electrical tape to keep it secured. I then did a Factory Reset using the option under "Settings/Backup and Reset". My N7 has been absolutely PERFECT since - just as most users report.
There is still the apparent issue of Google fixing the issue that causes the battery indication to be inaccurate.
I hope that this post serves to help others that experience these issues.
_______________________________________________
Update 2/16/13
I noticed in the past 2 days that my N7 started staying on 100% for prolonged periods of time. I figured that it once again lost it's ability to provide accurate battery status. Therefore, I projected that when it gets down to 30% or so, it'll turn off. It did.
I did the fixes I outlined in the OP and this time they didn't work. After pulling the battery and doing a factory reset, it still indicated 30% battery left - and I KNOW it's really at/near 0%.
I've been monitoring this issue since I made this thread and I've noticed that a growing number of N7 users were fixing this issue by simply turning off their N7's for a period of time. So I gave that a go.
I plugged my N7 in for about 20 minutes to give it the juice it would need to restart after the period of time being turned off. Then, I unplugged it and turned it off. Waited an hour, and when I restarted it, the battery had been recalibrated to 0%. Awesome!
So where does this leave us? Here are my thoughts:
- Since there are a number of different causes that result in the symptoms listed in the OP, those fixes are still relevant for those specific causes.
- We should add this latest fix to the collection, as it worked perfectly for me today.
- It's possible that our N7's should be periodically turned off - possibly overnight as it charges. I know that I plan to occasionally do this. If you don't have a disconnected/loose battery cable, or some issue with software that is remedied by a Factory Reset, maybe your N7 just needs to be turned off to recalibrate every now and then. Update: As of 5/3013, my N7 has been flawless. It's entirely possible that this is because I shut-down my N7 every week or two to recalibrate.
As always, I hope this keeps N7 users from freaking out, or sending their N7's back - unless it's really necessary.
And as I said in the OP, Google really needs to address this, as there's plenty of evidence that many N7 owners experience these issues. I'll update my report to Google.

Stock 4.1 upgraded to 4.2.1
No Root/unlock
Software or Hardware? Who know's..
I received my N7 on dec 20th 2012, still haven;t gotten to use it more than a day or 2... had battery issues off the hope, shut of at 21% ish... tried turning it on... just got screen flickering. Tried chargin it for hours, still nothing... after submitting an RMA after a couple days of charging with device on or off or with screen flickering ,,,nothing worked. Hung up with support... tried with USB connected to PC... got the device to boot.
I also in between random variations of cables and what not I did the D/C on battery ... didn't do much for me.
Charged device to 100% used down to 60% charged to 75%
Used again for 5 minutes
Device turned off.
Wouldn't boot
Another day of messing around... got it to turn on
Booted, battery was at 0% said it was shutting down
Tried a few more times (without charging) Just shut down cause battery was at 0%
Tried again, Booted said battery was at 85%
Light Use
Plugged in to charge, got home from work next day, device won't turn on
Been 3 days
New device form RMA gets in today.
If it comes with 4.1 I am going to run it for a few days because when i received my first device, it seemed to be working fine for the first 2 hours... got my device setup then decided to do the update to 4.2.1
Immediately my device shut down and gave me a screen flickering issue... did hard reset (held power for like 10 sec) device turned on... then experienced all the crap above.
So if i update after a couple days... and then run into issues... it would tell myself that there could be an issue with the update... but who knows as all the reading I have been doing, every scenario is different.
Google told me to submit a second RMA if it continues.... I'd rather not have the device if I just have to keep returning it.

Blesseld said:
Stock 4.1 upgraded to 4.2.1
No Root/unlock
Software or Hardware? Who know's..
I received my N7 on dec 20th 2012, still haven;t gotten to use it more than a day or 2... had battery issues off the hope, shut of at 21% ish... tried turning it on... just got screen flickering. Tried chargin it for hours, still nothing... after submitting an RMA after a couple days of charging with device on or off or with screen flickering ,,,nothing worked. Hung up with support... tried with USB connected to PC... got the device to boot.
I also in between random variations of cables and what not I did the D/C on battery ... didn't do much for me.
Charged device to 100% used down to 60% charged to 75%
Used again for 5 minutes
Device turned off.
Wouldn't boot
Another day of messing around... got it to turn on
Booted, battery was at 0% said it was shutting down
Tried a few more times (without charging) Just shut down cause battery was at 0%
Tried again, Booted said battery was at 85%
Light Use
Plugged in to charge, got home from work next day, device won't turn on
Been 3 days
New device form RMA gets in today.
If it comes with 4.1 I am going to run it for a few days because when i received my first device, it seemed to be working fine for the first 2 hours... got my device setup then decided to do the update to 4.2.1
Immediately my device shut down and gave me a screen flickering issue... did hard reset (held power for like 10 sec) device turned on... then experienced all the crap above.
So if i update after a couple days... and then run into issues... it would tell myself that there could be an issue with the update... but who knows as all the reading I have been doing, every scenario is different.
Google told me to submit a second RMA if it continues.... I'd rather not have the device if I just have to keep returning it.
Click to expand...
Click to collapse
Sorry to hear of this.
Not sure that I read that you did the Factory Reset, as suggested in the OP.
Give that a try.
Pulling the battery and/or doing a full Factory Reset is the fix for the vast majority of N7 users.
You may be an exception to that. Hope not.

Ya I have done the factory reset and battery pull, after the reset it just reset to 4.2.1 it came with 4.1.
Then it shut down on me again, I have my new unit it now. Running solid so far, good battery charge... not taking forever. hasn't shut down yet.
I'm going to run it on 4.1 for a day or 2 then update. Hopefully I don't run into issue after the update... it was probably coincidence but i ran into problems after updating on my first N7 to 4.2.1

Well, then unlike many other N7 owners, since you did both the battery pull and Factory Reset, you can rest assured that you didn't waste your time sending your N7 back - it needed replacement.
Good luck with it!

Just reporting back with a status. The fixes I described above seem to be working perfectly for days now. Check my OP and give those recommendations a shot if you're having any issues. Hope this helps to simplify a potentially confusing landscape and to resolve these issues for other N7 owners.

Two of the ”fixes” that folks anecdotally reported... using a battery calibration app and clearing battery stats are 100% guaranteed not to work. Those who actually ascribe any effect to them are merely using faulty reasoning. Quite simply, the calibration apps are just another method of wiping battery stats. Nothing at all in batterystats.bin has any bearing on battery life or reported charge indication.
This isn't directed at anyone in particular. Rather, I'm just expounding on something from the OP.
Definitely a very useful thread, given what seems to be a not too uncommon issue. As an aside, I've also experienced the problem after flashing a new kernel. Reflashing the previous kernel corrected the issue.
Sent from my Nexus 7 using Tapatalk HD

najaboy said:
Two of the ”fixes” that folks anecdotally reported... using a battery calibration app and clearing battery stats are 100% guaranteed not to work. Those who actually ascribe any effect to them are merely using faulty reasoning. Quite simply, the calibration apps are just another method of wiping battery stats. Nothing at all in batterystats.bin has any bearing on battery life or reported charge indication.
This isn't directed at anyone in particular. Rather, I'm just expounding on something from the OP.
Definitely a very useful thread, given what seems to be a not too uncommon issue. As an aside, I've also experienced the problem after flashing a new kernel. Reflashing the previous kernel corrected the issue.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
najaboy:
Excellent background on those two "fixes", and I agree 100%.
In creating this thread, I didn't want to really slam-dunk any of the "fixes" that other people have offered in other threads. But the research shows that you are exactly right: calibration apps and wiping battery stats will do absolutely nothing - guaranteed.
It's amazing how many misleading threads I had to wade-through to get to the fixes I recommend. No wonder so many people have returned their N7's to get one that "doesn't have the issues".

Crisis averted
billykxda said:
Trying to provide a single informational resource on three, typically related issues:
1. My N7 turns off randomly
2. My N7 dies early at ___% battery (you fill in the value)
3. My N7 turned itself off, and won't turn back on
There’s a ton of threads all over the net regarding these issues, some providing unintentionally misleading info, some progress towards actually defining the issue and posing possible solutions. Reports of these issues started back when the N7 was first released and continue to this day. These issues have been reported to Google, but who knows whether or not the Google God will attend to them anytime soon.
What follows is what I’ve learned about these issues, how they affected most users, and how they were resolved for most users. This is not intended to capture every possible exception.
Issue #1:
For some users, their N7 just turns off randomly, regardless of battery level. For them, a loose battery connector is typically the cause. Popping off the back cover, re-seating the connector and possibly putting a tiny piece of tape to keep it secured over time is the fix.
Issue #2:
Many users notice that their N7’s turn off by itself, typically when the battery is at the lower-end of the % scale – anywhere from 40% down to 20% or so. Most users think that their N7 is running out of power "early" – but it seems that the 40% - 20% indication is erroneous - the battery is really at 0%, and is turning off as it should. This appears to be the caused by a software glitch that Google has to address. Doing a Factory Reset and a battery pull appears to remedy this issue for just about everyone. Please note that a corollary to this issue is the observation that once charged, the N7 remains at 100% far longer than it should.
Issue #3:
Taken out of context, having an N7 that won’t start seems like a terrible thing. But in most cases, it’s caused by Issues #1 and #2.
- If Issue #1 caused it: reconnect the loose cable, recharge your battery if needed, and you are good-to-go.
- If #2 caused it, your N7 battery is dead. Plug your N7 into the original power supply, patiently wait a few minutes then patiently hold down the power button up to 30 seconds (actually look at your watch – it’s gotta be “up to 30 seconds”!), for just about everyone reporting, it’ll start up just fine.
Since these problems are widespread, there are a number of “fixes” offered other than those above, that are somewhat anecdotal – they only “work” in one/couple instances and therefore there’s no real evidence that they are relevant. This group includes:
- Using battery calibration apps to fix the problem
- Dumping battery stats
- Uninstalling a specific " troublesome" app
Some users send their N7’s back to Google, and their new N7’s are deemed "fine". A number of knowledgeable users have speculated that most of these N7’s sent back really only suffered from the fixable issues listed above. To support this notion, some have reported that the replacements have the same “defects” as their first units, and they continue to send them back.
My experience:
My N7 worked perfectly for the first two weeks of ownership. Then it started turning off at 30% and 23%. I also noted that once I charged-up, my N7 would stay at 100% forever, leading me to believe that the battery readings were hosed-up. After these problems started, it would not go below the 30%-20% thresholds. The first time I tried to power it up - it wouldn't - and I thought is had totally borked. I tried eventually figured out that I needed to add power, wait, then hold down the power button. Worked every time.
For me, I wanted to know if I had a loose battery connector - a common problem, even though my N7 was not shutting down randomly, it was always at low battery levels. I figured that I'd just do the two things that research showed would work for sure, and would cover two different issues. I popped the back off, found that the connector as well-seated, but I pulled it off anyway to do the "battery pull". I reconnected and added a bit of electrical tape to keep it secured. I then did a Factory Reset using the option under "Settings/Backup and Reset". My N7 has been absolutely PERFECT since - just as most users report.
There is still the apparent issue of Google fixing the issue that causes the battery indication to be inaccurate.
I hope that this post serves to help others that experience these issues.
Click to expand...
Click to collapse
Brand new Nexus 7 purchased today, came with 4.1 and I applied 4.2.1. Difficulties getting it powered on in the first place and lots of reboots and apparent crashes. Factory reset once and found some of those other threads you mentioned, disabled location services and that seemed to help a bit but still getting reboots. More digging and I found your post. Took your advice and pulled off the back of the Nexus 7, pulled the battery up and the connector basically fell out, it obviously wasn't seeded properly. Popped it back in properly and it's working much better now, although I'm going to give it 24 hours to make sure my issues are resolved. I just created an account in here to thank you. Think I'll stick around and see what else I can learn.

got my nexus 7 at September 2012,
got no problem with the abttery at the first charge,
but few weeks later, the battery started to die at 20% , then died at 30%, i didnt notice until i saw the battery history, it just jumped from 30% to 0%,
keep in mind that i'm not using the asus standard charger (dont know if this affect us)
tried charging it with the original charger, look like the problem is fixed, the battery died at 5%.
not sure if this is a coincidence or not
sorry for the bad English

Hazmatilda said:
Brand new Nexus 7 purchased today, came with 4.1 and I applied 4.2.1. Difficulties getting it powered on in the first place and lots of reboots and apparent crashes. Factory reset once and found some of those other threads you mentioned, disabled location services and that seemed to help a bit but still getting reboots. More digging and I found your post. Took your advice and pulled off the back of the Nexus 7, pulled the battery up and the connector basically fell out, it obviously wasn't seeded properly. Popped it back in properly and it's working much better now, although I'm going to give it 24 hours to make sure my issues are resolved. I just created an account in here to thank you. Think I'll stick around and see what else I can learn.
Click to expand...
Click to collapse
Congrats!
Go enjoy your new N7!

webslasher said:
got my nexus 7 at September 2012,
got no problem with the abttery at the first charge,
but few weeks later, the battery started to die at 20% , then died at 30%, i didnt notice until i saw the battery history, it just jumped from 30% to 0%,
keep in mind that i'm not using the asus standard charger (dont know if this affect us)
tried charging it with the original charger, look like the problem is fixed, the battery died at 5%.
not sure if this is a coincidence or not
sorry for the bad English
Click to expand...
Click to collapse
Have you tried the recommendations in the op?

billykxda said:
Have you tried the recommendations in the op?
Click to expand...
Click to collapse
I guess you solved your issue?

Re: N7 Turns Off/Won't Turn Back On - A Summary...
I did have issue #2. I already had fully charged over night. Battery indicator showed 100% for a while, so I figured the problem wasn't solved. What I did was shut down my N7, then hook it up to the charger, boot my N7, unhooked it from charger, played 1 level in Amazing Alex and checked battery indicator again: 99%. I hope this means I solved the problem for now
Verstuurd van mijn Nexus 7 met Tapatalk

Fotogravin said:
I did have issue #2. I already had fully charged over night. Battery indicator showed 100% for a while, so I figured the problem wasn't solved. What I did was shut down my N7, then hook it up to the charger, boot my N7, unhooked it from charger, played 1 level in Amazing Alex and checked battery indicator again: 99%. I hope this means I solved the problem for now
Verstuurd van mijn Nexus 7 met Tapatalk
Click to expand...
Click to collapse
Interesting. There have been reports of people addressing this problem by just turning off their N7 for a while, booting back up and all is well. Others like you added the plug/unplug charger to the mix and that seemed to work for them.
This issue has been reported to Google as well - there is a thread on Googles defect site that also lists all sorts of "fixes" that people have attributed to this issue.
Still, the only highly-repeatable fixes I've seen in various threads/forums are in the OP. But, who knows? If you can get your N7 past these issues, it's a good thing!

Re: N7 Turns Off/Won't Turn Back On - A Summary...
Hi, you can add me to the list. My N7 often turn off itself when battery level is under 50%. I have tried everything (factory reset, flash stock image...) but problem still persists.
So i have a N7 with half battery capacity most of the time. I hope next update will fix it otherwise i'll send it to Asus.
Edit: mine just switch off at nearly 25%, i'll try to downgrade to 4.1.2 and see if it helps...
Sent from my Nexus 7 using xda premium

roswell782 said:
Hi, you can add me to the list. My N7 often turn off itself when battery level is under 50%. I have tried everything (factory reset, flash stock image...) but problem still persists.
So i have a N7 with half battery capacity most of the time. I hope next update will fix it otherwise i'll send it to Asus.
Edit: mine just switch off at nearly 25%, i'll try to downgrade to 4.1.2 and see if it helps...
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Hi!
Did you try all of the suggestions in the OP?
-bk

Re: N7 Turns Off/Won't Turn Back On - A Summary...
Hi, i didn't open the battery cover because i don't want to lose my warranty, i prefer to let Asus do it for me.
My history with Asus is finished, bought 3 products from them, 3 have problems...
Btw: of course downgrade to 4.1.2 did nothing
Thanks for your answer and have a good weekend.
Cheers, Ros.
Edit: RMA asked, hope Asus will fix it.
Sent from my GT-I9300 using xda premium

My N7 is driving me crazy. Bought it last year around October, and it seemed fine at first. Battery would die at around 4-5% which is acceptable. Then it started getting worse over time. At this time it was completely stock - locked and not rooted. It got to the point where it would shut itself off when it reached 40%, so I decided to factory reset, pull battery, unlock, root and install Paranoid Android, hoping this would solve (or help) the issue.
Did all my unlocking and rooting last night, installed PA, set everything up, then started reading on my N7. Device turned off at 65% now. To say that I'm disappointed is an understatement. I'm all out of ideas on what I can do to fix this thing. I charged it overnight and disconnected it from the charger 3 hours ago, and it's still at 100%, even though I've used it quite a bit. Infuriating.

ynrozturk said:
My N7 is driving me crazy. Bought it last year around October, and it seemed fine at first. Battery would die at around 4-5% which is acceptable. Then it started getting worse over time. At this time it was completely stock - locked and not rooted. It got to the point where it would shut itself off when it reached 40%, so I decided to factory reset, pull battery, unlock, root and install Paranoid Android, hoping this would solve (or help) the issue.
Did all my unlocking and rooting last night, installed PA, set everything up, then started reading on my N7. Device turned off at 65% now. To say that I'm disappointed is an understatement. I'm all out of ideas on what I can do to fix this thing. I charged it overnight and disconnected it from the charger 3 hours ago, and it's still at 100%, even though I've used it quite a bit. Infuriating.
Click to expand...
Click to collapse
Sorry to hear this. This is what I'd recommend...
Take the N7 back to bone stock to reduce the number of variables. Follow my suggestions in the OP (I know you've already done them - but I'd still "do the drill" again). If this doesn't work, you can try some of the outlier suggestions that others have made that are less substantiated - why not at that point? If it's still a no-go, I'd return it. For your money, you deserve a perfect N7.

[Q] Nexus 4 Instant Battery Drain/Shut-Off

Hi
I have recently started having a problem with what I presume to be the battery of my Nexus 4. It seems to have started suddenly about a week ago, though was working absolutely fine before. I don't think it was due to any specific app having been installed. I have also done a factory reset on it, but that didn't solve the problem.
Basically, the battery will discharge to about 75%. The phone will then suddenly switch off; turning the phone back on, it simply shows the battery to be fully depleted and switches off. If I plug it into a power source, the phone turns back on and begins charging, from 0%, though seems to suddenly fully charge it within about half an hour.
My phone has not been rooted.
I would really appreciate any help/advice on this issue as it is incredibly frustrating having to have my phone almost permanently on charge.
I have attached two screenshots of the battery usage graph.
Thanks!

bab88 said:
Hi
I have recently started having a problem with what I presume to be the battery of my Nexus 4. It seems to have started suddenly about a week ago, though was working absolutely fine before. I don't think it was due to any specific app having been installed. I have also done a factory reset on it, but that didn't solve the problem.
Basically, the battery will discharge to about 75%. The phone will then suddenly switch off; turning the phone back on, it simply shows the battery to be fully depleted and switches off. If I plug it into a power source, the phone turns back on and begins charging, from 0%, though seems to suddenly fully charge it within about half an hour.
My phone has not been rooted.
I would really appreciate any help/advice on this issue as it is incredibly frustrating having to have my phone almost permanently on charge.
I have attached two screenshots of the battery usage graph.
Thanks!
Click to expand...
Click to collapse
If you are on stock, try flashing the stock image(4.2 or 4.3 up to you) there's plenty of threads on here thatll guide you thro the process.

I've had the same issue about three times, during the first week of using my Nexus 4 (about half a year ago). I've already had my mind made up to RMA it, but waited for it's shut-off to happen once more to collect some evidence of this problem and... it never happened again. I'm pretty confident that I didn't install anything that might have helped (I only installed BetterBatteryStats to check the instant drain, but really doubt it could change anything, it's just statistics), and I've never factory wiped the phone's data yet.
I've been searching for answers around the internet back in May, but never found anything of value, so my only advice is... wait a little, and if it doesn't get better itself return it to the merchant. My previous HTC phone was restarting almost everyday from the first day I bought it, until a month later I returned it for warranty repairs and after they changed almost all internals of the phone it never crashed again (till today, since I still use it as GPS and media player when running).

Battery reading issues

Hey everyone. So I bought a second hand note 4 recently and have been having battery problems.
I did a full wipe install of CM13 and the battery dropped to 0% at random times and I had to plug it in the charger for the phone to even boot as it would just restart as soon as it turned on. Anyway, i thought this is probably due to faulty battery. I purchased another one and now this one doesn't reboot at random times but seems like the phone keeps reading the battery percentage wrong, sometimes it doesn't charge over certain percent, just gets stuck at 77% or 63% or any percentage really. If I remove the battery and plug it back in, it shows a completely different percentage everytime. I have tried wiping battery stats, do a full discharge/charge, nothing seems to help. Battery drains fairly fast too, once I manage to get it to 100% it shows that expected time is like 2-3hrs if screen on. Thanks!

idoluvizsick said:
Hey everyone. So I bought a second hand note 4 recently and have been having battery problems.
I did a full wipe install of CM13 and the battery dropped to 0% at random times and I had to plug it in the charger for the phone to even boot as it would just restart as soon as it turned on. Anyway, i thought this is probably due to faulty battery. I purchased another one and now this one doesn't reboot at random times but seems like the phone keeps reading the battery percentage wrong, sometimes it doesn't charge over certain percent, just gets stuck at 77% or 63% or any percentage really. If I remove the battery and plug it back in, it shows a completely different percentage everytime. I have tried wiping battery stats, do a full discharge/charge, nothing seems to help. Battery drains fairly fast too, once I manage to get it to 100% it shows that expected time is like 2-3hrs if screen on. Thanks!
Click to expand...
Click to collapse
battery displaying different percentage after u remove it and put it back in is normal i have 3 note4s all do the same (up to 10 percentage change, it either increases or decreases) but the other issues like getting stuck on a certain percentage are not normal make sure u have the genuine battery and try stock rom.

yeah, i tried stock and the same thing really. such a random issue. I just noticed that battery charges once I turn the screen on and use it , so it only gets stuck on random percent only with screen off.

idoluvizsick said:
yeah, i tried stock and the same thing really. such a random issue. I just noticed that battery charges once I turn the screen on and use it , so it only gets stuck on random percent only with screen off.
Click to expand...
Click to collapse
U can try recalibraring the battery....

Bishal 00 said:
U can try recalibraring the battery....
Click to expand...
Click to collapse
yeah, i said I wiped battery stats, which is basically recalibration

once the battery is charged to 100% it also drops first 10-20% really fast and then it gets better but still I only get around 2hrs screen time

idoluvizsick said:
yeah, i said I wiped battery stats, which is basically recalibration
Click to expand...
Click to collapse
Oops my bad..Didn't read your whole post...

the only way to fix this replace your battery by new one
i tried all options (Format ROM - Wipe battery status - Getting back to stock ROM - Unroot - re Celebrate apps - Changing recovery-Removing battery from device for while sleeping - charge without fast charge - charge via USB)
i asked myself after that all of this headache doesn't worth 20$, i replaced the battery with new one and its working fine now

A0_o said:
the only way to fix this replace your battery by new one
i tried all options (Format ROM - Wipe battery status - Getting back to stock ROM - Unroot - re Celebrate apps - Changing recovery-Removing battery from device for while sleeping - charge without fast charge - charge via USB)
i asked myself after that all of this headache doesn't worth 20$, i replaced the battery with new one and its working fine now
Click to expand...
Click to collapse
yeah, i replaced battery as well but it's still the same issue. old one at least charged fully but would randomly reboot on me, the new one doesn't reboot but drains extra fast and doesn't always charge fully. can't believe both batteries are faulty

I am sorry for summoning this old post but did you find any solution to your problem? I have exactly the same experience with my note 4.
Thanks!

Is there a solution for this problem?

Power down and then out-and-in same battery and my stuck-at78%... was 100% when started.
if you having problems with auto restarting.... download the app " WAKE LOCK" and put it on Partial Wake Lock setting... your restarts will be a thing of the past.

Phone shuts down and refused to start unless plugged in.... a non-hardware issue?

I've seen a couple threads that look like this issue. I have replaced my battery and I think it's good. I get great life and performance out of it.
This has happened a hand full of times. It started with the stock camera app. I double tapped power to launch the camera and it turned the screen on for a second then shut down. It happened a few more times when I was using the camera (launching, taking a photo, switching to front camera... ). Since I've had issues with the camera app I've wiped all internal storage and reloaded the ROM and apps. Just yesterday it happened again when I was loading the MyRadar app.
All times were with plenty of battery left, usually more than half. Plugging it in for a second will let it start and operate normally again with a good and same amount of battery left. I've used a couple benchmark apps to stress the phone to see if it was heat or power related, but no issues. I've manually tried running through a ton of apps to stress it (including the ones that gave issues) and still no problems.
Is there a chance this isn't a hardware issue? Maybe an issue with the ROM, Gapps, radio, vendor, etc... ?
ABC ROM from 06/24
Gapps from around the same date
Rooted with Magisk
Kernel Adiutor - only DT2W enabled

I know you said you replaced you battery.... But, it is typical symptoms of a Nexus 6P battery dying. I had the same kind of issues (shutdown when starting the camera, for example). Issues were worse in cold weather. We visited Iceland and i wasn't able to use my phone for anything else than GPS in the car while driving (connected).
All my issues went away when i replaced the battery.
Not saying this IS your issue, but it sure does feel familiar.
EDIT: Added a screenshot showing a 71% shutdown.

nlz242 said:
I know you said you replaced you battery.... But, it is typical symptoms of a Nexus 6P battery dying. I had the same kind of issues (shutdown when starting the camera, for example). Issues were worse in cold weather. We visited Iceland and i wasn't able to use my phone for anything else than GPS in the car while driving (connected).
All my issues went away when i replaced the battery.
Not saying this IS your issue, but it sure does feel familiar.
EDIT: Added a screenshot showing a 71% shutdown.
Click to expand...
Click to collapse
Do you have trouble starting the phone again once it shut down from a bad battery? I'm not denying it's a posibility, but I was under the impression that if a phone died from a bad battery it would either restart itself or was able to power on normally. Or, maybe my replacement battery has faulty circuitry of some sort.

Schiben said:
Do you have trouble starting the phone again once it shut down from a bad battery? I'm not denying it's a posibility, but I was under the impression that if a phone died from a bad battery it would either restart itself or was able to power on normally. Or, maybe my replacement battery has faulty circuitry of some sort.
Click to expand...
Click to collapse
Yes, i had issues starting the phone after those shutdown, I 100% had to connect it, wouldn't start otherwise. Even that time when it shutdown at 71%, i had to plug it to get it restart.
Super annoying when you are on vacation to a foreign country... Wanted to throw the damn thing in a volcano! haha
Since i changed the battery i became super an*l about it, installed AccuBattery and got it set to warn me at 70%. I only do 100% charges when i know i'm gonna need that autonomy. So far (a little more than a year later) i'm good, no issues.

nlz242 said:
I know you said you replaced you battery.... But, it is typical symptoms of a Nexus 6P battery dying. I had the same kind of issues (shutdown when starting the camera, for example). Issues were worse in cold weather. We visited Iceland and i wasn't able to use my phone for anything else than GPS in the car while driving (connected).
All my issues went away when i replaced the battery.
Not saying this IS your issue, but it sure does feel familiar.
EDIT: Added a screenshot showing a 71% shutdown.
Click to expand...
Click to collapse
nlz242 said:
Yes, i had issues starting the phone after those shutdown, I 100% had to connect it, wouldn't start otherwise. Even that time when it shutdown at 71%, i had to plug it to get it restart.
Super annoying when you are on vacation to a foreign country... Wanted to throw the damn thing in a volcano! haha
Since i changed the battery i became super an*l about it, installed AccuBattery and got it set to warn me at 70%. I only do 100% charges when i know i'm gonna need that autonomy. So far (a little more than a year later) i'm good, no issues.
Click to expand...
Click to collapse
Well, damn.... that's depressing. Maybe I'll get another battery if this keeps happaning.
Thanks for the info!