Hi all, based on my experience of flashing various different ROMs, most of the ROM shouldn't have the battery drain issue. However, I discovered some times after flashing a new ROM the device gets much warmer and the battery drains very quickly.
When this happens the best solution is to shutdown the device, pull the battery out for 5 minutes or so to let it cool down. Then put it back and turn on the device and the battery drain problem should be resolved.
I haven't been able to find the reason behind that but it does make a big difference. With one of the ROM I flashed, the battery went from 100% to flat in less than a day even when no WiFi and no bluetooth are turned on. Then I recharged the device, pulled the battery out to let it cool down and put it back. After that the battery went back to normal with only around 3% consumption overnight.
I guess this is because with a flash of a new ROM the learned parameters for the battery will be erased, too:
http://www.freepatentsonline.com/20020105303.html
So the more charging/draining cycles you do this should improve again.
Hi guys I know battery issues are covered a lot but this is slightly different.
The past couple days my battery has drained a lot. Within 6 hours usually its a minimum 7 hours until it reaches 20%.
But since yesterday Android System has been partial wake lock, according to battery use it was 50%. It was only till I rebooted earlier this afternoon that it was cleared but saying that the drain after a full charge ive been on battery for 3 and half hours im already on 53%. Should I use battery calibration app to remove battery stats? Im not sure if I should as once I reach 90% the battery stats reset itself.
Im on stock rom rooted latest firmware.
Thanks in advance
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Recently I updated my tablet to the stock 4.4 room via the OTA update.
Since then, my battery life has gone horrendous.
Android OS takes up most of the battery when the tablet is idle.
With ~2 hours of screen time and a day on the battery, it has drained down to 30%.
Anyone facing similar issues?
frictionbuster said:
Recently I updated my tablet to the stock 4.4 room via the OTA update.
Since then, my battery life has gone horrendous.
Android OS takes up most of the battery when the tablet is idle.
With ~2 hours of screen time and a day on the battery, it has drained down to 30%.
Anyone facing similar issues?
Click to expand...
Click to collapse
were your data connection and Sync ON??
Bad Battery
I experienced the same bad battery today.
for test purpose i set the tablet to flight mode and left home for around 8 hrs.
when i came back it has already died out,,, if i check the usage the Google Service has used 46% of the juice.
I'm having same problem. Device was fully charged, 6 he's later with light use it died. Here's a screenshot showing Google services
Sent from my Nexus 7
Hi, I have bought a G Pad for my mother-in-law, and recently she started complaining on the battery life. Indeed I have noticed, that after fully charging and leaving the device idle it looses 40% of the battery over 12 hours. I have made a factory reset, but the battery has drained 12% in 12 hours with everything off and a few minutues of screen on time (only used to for the initial set up after the reset). Also I have the feeling that the drain increases with every hour.
Battery stats say that Android OS is the most heavy drainer. Do you have any suggestion how to fix this (besides trying a different ROM - i don't want to do this at the moment).
Thank you
molnartibor said:
Hi, I have bought a G Pad for my mother-in-law, and recently she started complaining on the battery life. Indeed I have noticed, that after fully charging and leaving the device idle it looses 40% of the battery over 12 hours. I have made a factory reset, but the battery has drained 12% in 12 hours with everything off and a few minutues of screen on time (only used to for the initial set up after the reset). Also I have the feeling that the drain increases with every hour.
Battery stats say that Android OS is the most heavy drainer. Do you have any suggestion how to fix this (besides trying a different ROM - i don't want to do this at the moment).
Thank you
Click to expand...
Click to collapse
Try to use wakelock detector and greenify to check and stop the process that could be causing this battery drain.
Sent from my LG-V500 using XDA Premium mobile app
Do you have an SD card in it? Try taking it out and see if the battery drain goes away. A bad SD card will cause android to keep scanning the card...
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I am seen huge battery drain on Nexus 7 2013 after flashing Android 6.0 factory image. Even battery usage option screen gives strange result. For example -- Total battery % used by all the apps just show 9%, while total battery left is only 73% after fully charging of 100%. So where is the remaining battery of 18% gone, which is not even showing up in battery uses option screen?
Attached herewith is screenshot of battery usage screen. And I really notice huge battery drain with Android 6.0 as compared to earlier Android 5.1.1.
Please help and let me know.
You're estimated time left @73% is 3 days, which means your tablet has been on and not charged in awhile. Nothing in your battery stats indicates any battery drain at all.
Sent from my Nexus 7 using Tapatalk
It just says 3 days remaining. But practically this never happens. Now overnight there is 30% battery drain without having used the tablet and it says now 43% battery remaining and one day left. And total usage mentioned by apps in battery usage screen is not even more than 15% now also. And if you add actual battery usage of all apps by clicking the indivisual battery usage details, total usage is not even 500 mAh. I believe Total Nexus 7 battery capacity is around 4000mAh.
So where is the battery use and drain is happening? This behavior I am seeing is after upgrading to Android 6.0.
I've got quite a bit of mystery drain as well. It runs flat for a little while when the display is off and it is idle for a long time, then suddenly it will just start draining ~2% per hour. The wifi lists as always on even though the policy is "Never". I have location services off, bluetooth off, NFC is off. Even more fun I put the tablet down 2 days ago at 75% battery and I picked it up this morning I picked it up and it was dead. No battery log at all either.
Hmm. I'm running stock rooted with ElementalX, and haven't had any battery issues.
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Exactly the same issue here. Battery drains fast but battery stats shows no abnormality. I work for an Android phone manufacturer. My colleague who is in charge of the battery thing guesses some hardware module might have current leakage in sleep mode which software cannot detect.
I have wiped cache partition and now see massive battery usage by WiFi after overnight. Looks to be problem stated in the thread https://productforums.google.com/forum/#!topic/nexus/NB0izQHuBaU;context-place=forum/nexus
Though this issue is raised for Nexus 5, I think it applies to Nexus 7 2013 Android 6.0 also.
You are not alone. My Nexus 7 is currently chewing through it's battery at a rate of knots. Even with the screen off it continues to use the battery as if it were on all the time. After wiping the cache partition things have become even weirder. Apps that have not been opened are using large percentages of the battery. I can barely get a few screen hours out of it.
Wondering if this thread has so few replies because people are checking the general section and seeing nothing about the issue so think it's just them?
The information on battery usage is so weird it's hard to believe that it's producing any useful or meaningful data.
Even I am surprised that no battery drain issue for Android 6.0 is reported for Nexus 7 2013 in this forum and not many members have replied to this thread.
Anyway for me it is a serious issue with absolutely no advantage in any sense for upgrading from Android 5.1.1 to Android 6.0 for Nexus 7 2013.
Here is one more screenshot of battery drain with no battery accounted for 27% (48% total battery drained - 21% battery used by apps reporting in attached screenshot).
I hope at least Google Android team is aware of this issue and knows how to resolve it.
Still amazed that there are only a handful of replies to this thread.
Got the System Update notification today. Size is of 2.2 MB. Downloaded but unfortunately battery charge was not enough to do the OTA install. Will charge the Nexus 7 2013 and install the OTA update. Let us hope that this OTA has fix for this battery drain issue. Will check and let you all know tomorrow.
Even new factory image for Android 6.0.0 build MRA58U is available now.
Same issue of battery drain with MRA58U OTA update also. 20% battery drained out during night within 7 hours when Nexus 7 2013 was idle without any activity.
Same issue here. Flashed 6.0 last weekend. 2/3% idle drain an hour while everything (bt, location, syncs, nfc) is off except wifi. Wifi keeps connected while set to go off when screen off. SoT off course hours less with the idle drain.
Same Issue battery Drain
Same issue battery drain ....i hope the lattest update send me by OTA this week resolves the problem...
I'm seeing great battery life now without root and Greenify or any third party solution but I have problems with the stats. If I let my n7 drain completely and charge it to 100% while shutdown I get +10h SOT (lowest brightness) but if I charge it from 1% without being shutdown I only get 8h SOT. Huge inconsistency in the stats, it's like the system misinterprets the stats and need a reset after every charge.
Hi!
I'm having the same problem with huge battery drain in sleep mode with my nexus 7 2013 after the update to android 6.0.1.
It is using 2-3% of battery per hour when in sleep mode, but the problem is, nothing is indicating what is causing this drain (in battery usage stats everything show as normal - no huge battery drain by the app or wifi, but something is still draining battery).
Prior to the update (Android 5) i was losing maybe 5-6% per 12 hours at most (cca. 0.5% per hour) and the tablet would last 3-4 days, now I have to charge it almost daily.
Any more news on this issue or possible solutions?
Thanks.
Nexus 7 2013 lte android 6.0.1 battery drain for me....
+1
I just turn off the wifi icon from the Quick Settings.
6.0.1 nexus 7 2013 wifi.
I downgrade to kitkat 4.4.2 and my nexus after 24 hours in standby only drain 12% battery......the problem are android 5 and 6 the tab work great and faster whit kitkat no lag or other problem
Very bad google policy