yashsingh1/xdaforums huggingface dataset:
[Nexus 7 (2013) General] zedmaster375:
But sure if mine's better, but it may be showing signs of improvement this morning. The only thing odd I noticed was one of my Google accounts had a sync error yesterday. It didn't show up in the notifications bar, I had to look the Google accounts settings. Could be total coincidence.
[Nexus 7 (2013) General] datallboy:
If the battery lasted for 5 days then this isn't abnormal. Get wakelock , see what's hogging CPU and stuff.
[Nexus 7 (2013) General] biggiestuff:
Mine has nosedived to. I usually get flat lines when the tablet is asleep but lately it's just a descending line. Awake time vs screen on time is very close so not sure what's draining it. I do notice Google search audio in is showing itself more in the partial wake lock
[Nexus 7 (2013) General] Solaris81:
Yes something is definitely wrong. I fully charged my nexus again, then used it for about 3 hours of screen on time on the first day, which brought it down to about 65%, then woke up this morning about 8 hours later to see it was at 38% taking the now familiar nose dive. Once again I checked CPU Spy and the entire time it is apparently in deep sleep mode. I don't understand it.

Anyway before work I decided to turn off wifi, to rule out it being a wifi issue or sync problem, now after work I see the battery nose dive has continued on the same trajectory, down to 5% with wifi and in deep sleep mode. Now down to 2% in the time it took me to upload the image and type this out. I'm starting to think my battery might be on it's way out. :(

Here's a capture of todays battery stats.
[Nexus 7 (2013) General] CrashTestDroid:
So is this just on stock roms then? Or are any of you running CM or something else?
[Nexus 7 (2013) General] Solaris81:
I'm fully stock. Also since first coming here to start this thread, I've unlocked my bootloader to install and lock in one of the touchscreen software images posted in these forums. Obviously I had to do a complete factory reset to unlock the bootloader. The problem has persisted.

I've now charged the phone to 12% then left it for a couple of hours. It stayed at 12%. I ran a few processor heavy apps like Quadrant to just get the battery moving and got it to 11%, left it for 30 minutes, came back and it's still at 11%. So it doesn't seem like there is an issue simply at lower percentages.

On all 3 occasions before, the battery had drop normally to around 65-55% and then just died within the space of a few hours, with no screen time or processing going on. Almost like 55-100% was actually 95% of the battery and 0-54% was actually 5%. The test I just did seems to rule that out, now I'm going to charge to 100% and see if it happens a 4th time, which might take a day or 2.

I can't think of anything that could be causing this, the only new app I've installed over the last few days was Minion Rush, but if that's causing the battery drain it's doing it in a very stealthy way both bypassing the battery stats and CPU Spy's monitoring of the CPU state.
[Nexus 7 (2013) General] md1008:
My battery life is mediocre at best
[Nexus 7 (2013) General] devilsmack:
I thought it had gotten better but it hasn't. I used to get 3 or 4 days standby but now I'm not even making it through a day. I haven't installed our changed anything. I'm on stock rooted and I flashed those bionic and dalvik optimizations a while back but that was way before this. Anyone have any ideas?
[Nexus 7 (2013) General] Solaris81:
I'm really starting to think my battery is just on it's way out. Yesterday I charged to 100% again, after around 2.5 to 3 hours of active use, then leaving it on in standby all night then some use this morning, I got it to 62%, which is roughly the percentage where it starts to drop sharply. I went out for about 3 hours, get back check the tablet and it's at 51%, and it's started the trajectory downwards.

I've just done a restart and will see if the decent continues. If so then there is literally nothing left I can think of that would be causing it other than a bad battery.
[Nexus 7 (2013) General] devilsmack:
Good news. Switched to ART and battery has been better. Going 6 hours so far and only 2% battery drain. Could be art or could be wiping dalvik that helped. I may switch back later to see if it cleared up.
[Nexus 7 (2013) General] Solaris81:
So an unusual turn of events to report. Mid nose dive I decided to do a restart and much to my surprise this stabilised the battery. Great news that it's not a physical battery problem, but now I have absolutely no idea what it is. CPU Spy still reports deep sleep mode during the dives and no stand out app shows up on the battery stats. Something fishy is going on with one of the apps.
[Nexus 7 (2013) General] anwedr:
Seems some of us experience the same issue. This became a recent issue. It wasn't like this before.

I thought it was Facebook causing the battery drain, but when I open up BBS and Wakelock detector, the tablet is in deep sleep well over the 90%.

The tablet used to last me about 5-7 days idle. Now? 2-3 days checking email, twitter, and couple minutes on Instagram. heh.
[Nexus 7 (2013) General] Solaris81:
Same situation again, however this time the sharp battery decline happened a lot sooner, left tablet at 92% last night before sleeping, this morning it was at 70% on a sharp trajectory downwards. Again a reboot stabilised the battery. I'm now doing another factory reset, and will restore my account and only the most necessary apps like e-mail and skype. I did a factory reset earlier to unlock bootloader but straight after reinstalled all of my apps so one of them could be the problem. I'll post back with the results.
[Nexus 7 (2013) General] md1008:
I had the same exact problem, my tablet would basically lose 50% over night. I was still getting decent on screen time but idle time was crap. I flashed slimkat and woke up to my tablet being at 80%. Much better Google obviously didn't do a good job on this rom for Nex7
[Nexus 7 (2013) General] Solaris81:
I'm doubting this is a ROM problem as there hasn't been an update for quite a while now and this problem only occurred for me in the last week or so. Before that I was getting over 10 days of standby time including 10-15 mins screen time a day on a single charge.
[Nexus 7 (2013) General] OJ in Compton:
Heh, I came here to see if anyone is having this issue too. My battery has been draining rapidly the past few days and today I lost 44% battery overnight and my attempts at finding out what caused it have been fruitless. I'm wondering if it's an issue with a Google service, because I haven't installed any new apps lately.

An issue that seems to accompany this is extreme difficulty in using the touch screen, where it takes multiple attempts to scroll or select something. When I enable pointer display in Dev options, it is clear its not responding to some touches. Have any of you guys experienced this in the past few days too?

Stock Wi-Fi model here.
[Nexus 7 (2013) General] klobkelosh:
Ditto here - bone stock, unrooted, started about 2 weeks ago. Loses just under 50 percent overnight. No obvious culprit. I'm gonna try the ART suggestion if, for nothing else, to wipe the dalvik cache.
[Nexus 7 (2013) General] OJ in Compton:
Hopefully it works for you, but I am experiencing the battery drain on ART. Haven't used Dalvik since November.
[Nexus 7 (2013) General] klobkelosh:
Nope, didn't work...
[Nexus 7 (2013) General] Aerowinder:
RMA if you still can.

Everyone else: if you can RMA, I would suggest doing it. I had to RMA my first one because of touch screen problems (the poster I quoted has the same issues). I factory reset it, charged it up to 100% and turned it off. I didn't turn the screen off, I powered the device down. I tried to turn it on two days later to make sure everything was done properly before sending it back, and the battery was totally dead. Wouldn't even turn on. How? It was ******* off!! Multi-touch issues, ghost touch issues, battery defects. Hats off to Asus on this one, great job guys.

TL;DR: it's a hardware problem. RMA if possible.
[Nexus 7 (2013) General] anwedr:
This issue pretty much happened overnight. I don't doubt it's a hardware defect for some users.

I reinstalled Greenify and added lots of apps that I believe are causing the device to plummet in battery. Since, 11hrs of idle time the tablet only lost 3%.

I've also changed my wifi settings to disconnect the connection when idle. If things worsen I'll RMA.
[Nexus 7 (2013) General] tomvankirk:
I think I've solved it by greenifying Skype. I noticed the problem started right around Feb. 19 which was the day after the most recent update of the Skype app.

I can't explain why the tablet is reporting deep sleep.

Incidentally, I've also fixed a different issue on my nexus 5 by greenifying Skype. In that case, it was causing a camera wakelock and knocking the camera completely out of commission until a reboot.

The cynic in me wants to blame Microsoft for planting this Trojan horse.
[Nexus 7 (2013) General] klobkelosh:
I'm gonna try uninstalling Skype. I noticed that every time I used greenify non root to hibernate apps, that Skype was on the list, even tho it doesn't show as a running app anywhere. My problems started a few weeks ago, which would be consistent with the Skype update. Will report back and let know if this did anything.
[Nexus 7 (2013) General] md1008:
I never had issues with my Nexus 5 with Skype running. Only nexus 7 which has had crap battery for me up until I installed slimkat
[Nexus 7 (2013) General] OJ in Compton:
It's funny you say that, because this morning after the battery drain I reset my tablet. After booting, I got a message that Skype unexpectedly closed.

Uninstalled it immediately, let's see if things get any better tonight.

I would be hesitant to RMA my tablet for an issue that popped up overnight that hasn't happened since I bought it in august, especially since my touch screen isn't a nightmare like previous units I've been through.
[Nexus 7 (2013) General] md1008:
Could also be recently updated google play services although no issues with my Nexus 5
[Nexus 7 (2013) General] zoltan.fekete:
Same problem here, nexus 7 WiFi. Runing latest stock, rooted just to be able to get the stats for wake locks etc. I tried everything. The best I managed is about 15% drain for 8 hours of standby time. That is without usage and almost everything off (WiFi was on). In the stats deep sleep was actually almost 100%, but the device still lost 15%....

It's a brand new tablet, bought couple of days ago.
[Nexus 7 (2013) General] Solaris81:
Come to think of it I have been using Skype on the nexus for the first time in a while lately. I've installed it again after the most recent factory reset but haven't signed in yet. I'll check if the battery remains stable when I get home and if so I'll give it a few days then recharge then sign into Skype, sign out then see what happens.
[Nexus 7 (2013) General] klobkelosh:
Fingers crossed, but so far removal of Skype seems to have stabilized my battery. I'll withhold final judgment for another day, but I've been running off power for 3 hours with no idle battery loss.

Regarding Skype, the drain seemed to be there whether or not i was actually signed in. So for a real test you might want to uninstall it.
[Nexus 7 (2013) General] OJ in Compton:
I'm at 12 hours of normal idling after uninstalling skype. Looks like that was the culprit.
[Nexus 7 (2013) General] Solaris81:
Just got home, 25 hours of perfectly stable battery after the factory reset, I have skype installed but haven't signed in yet. What I'm thinking is that if Skype is the culprit, then actually signing in is causing the problem. Once signing in I always manually sign out so that doesn't seem to help. I don't think actually having the app installed in the issue alone since I've always had it installed and lately the timing behind the start of the battery drain seemed pretty random. The first time it was after 5 days, then 2 then 1, and thinking back I'm pretty sure I was on Skype the night before on each occasion. A restart seems to solve the problem too, perhaps until the next time you sign into Skype again.

The confusing thing about all this is how is Skype doing this to the battery without leaving any trace in CPU-Spy or the battery usage stats?
[Nexus 7 (2013) General] md1008:
All I know is that I am happy to have my Nexus 7 running as it should

---------- Post added at 07:59 PM ---------- Previous post was at 07:57 PM ----------

Judging how everyone here is having issues with battery appear to have Skype. It's likely the issue. I will sign into Skype log off and see if my tablet goes back to craptastic
[Nexus 7 (2013) General] dakunclear:
I had the same issue on kit Kat had to downgrade to 4.3 in order to fix it.....along with the touch screen issues that suddenly appeared, I personally am going to wait it 4.4.3 or 4.4.4 for them to make a good fix on all of it
[Nexus 7 (2013) General] Solaris81:
Keep an eye on this thread as it's looking very likely skype is the culprit and not 4.4.2. Still no sign of battery drain on my device yet.
[Nexus 7 (2013) General] klobkelosh:
Same here... 15 hours with no drain
[Nexus 7 (2013) General] anwedr:
On Skype, not greenified, and still above the 90% battery life after 36 hours. My problem may have to do with Facebook.
[Nexus 7 (2013) General] ultramaximum:
Skype uninstalled -> end of battery drain :good:
[Nexus 7 (2013) General] klobkelosh:
See this - http://phandroid.com/2014/03/04/and...ogle-fix-arriving-in-a-future-android-update/

Perhaps not Skype but KitKat?
[Nexus 7 (2013) General] tomvankirk:
That is the underlying bug on the nexus 5, but it begs the question why is Skype trying to activate the camera on my device when I'm not even signed in to the app? That's spyware type behavior.
[Nexus 7 (2013) General] klobkelosh:
Agreed. Smh skyprosoft
[Nexus 7 (2013) General] Solaris81:
Yeah that's clearly a different problem, for starters it shows up in the battery stats while the problem mentioned by us in this topic is suspiciously stealthy. Anyway another perfectly stable day for the battery, having still not signed into Skype, I'm certain that was the problem now, but will still continue until battery in below 20%, then charge to full, sign in then out of Skype and see what happens. It could either be a direct issue with Skype or a problem with 4.4.2 that Skype is somehow triggering. Either way, glad my Nexus is back to normal.
[Nexus 7 (2013) General] saneofficial:
Same issue

hey guys i have the same issue, i've got to the point that i've disabled ANYTHING! wifi,brightness to zero, auto sync is off everything , just name it and still drains battery like a m f when idle.my battery now is at 63% and i've just unistalled skype.Hope this will help.Btw did you think that is normal?
[Nexus 7 (2013) General] klobkelosh:
Not normal. I'll bet it gets better after you uninstall Skype.
[Nexus 7 (2013) General] gmaugham:
Thanks, everyone. Skype was the culprit.

Verstuurd vanaf mijn Nexus 7 2013 met Tapatalk.
[Nexus 7 (2013) General] Solaris81:
Yeah almost certainly Skype. Just gone 6 days straight without charging, 3 hours of screen time, and I'm still at 38%. Now I'm going to fully charge, sign into Skype then sign out, then see what happens.

On a side note, over several months I've noticed very inconsistent battery life on my HTC One X, running cyanogenmod 10.2. I don't restart my phone very often, so last night I thought what if it's skype causing this problem too? To my surprise I found Skype near the top of the list on my Data usage log, for the day, and for the week, despite me not using skype on my phone in well over a week and then signing out. Uninstalling skype then restarting my phone has also stabalised it's battery, before I was getting less than 20 hours irrespective of usage.

I forgot to check data usage on the nexus 7 but will definitely check it if I manage to repeat the nose dive later today. If so Skype will have a lot to answer for.
[Nexus 7 (2013) General] Solaris81:
And here's the result of fully recharging, signing into Skype and then immediately signing out, then just waiting.

What's more shocking is that after signing into Skype, it used a bunch of data to sync up with my latest conversations, then I signed out, check the data usage, it was 4.69MB exactly. Just now I checked and it was at 211MB. Just to make it clear I am 100% clicking "sign out" from the Skype status menu.

So not only do we have Skype killing the battery, it appears to be doing some monitoring and sending data back and forth, and is doing all this while avoiding detection from the battery stats or CPU-Spy, the only monitoring feature they appear to not "trick" is the data usage information.

My HTC One X also now has much better longer lasting battery since uninstalling Skype a couple of days ago, and that is running Cyanogenmod 10.2 which is android 4.3, so this is not an issue with the latest android that Skype is simply triggering.

I think this almost deserves a topic of it's own, as it sounds like something not strictly legal might be going on with Skype here. I'm not one to jump to conclusions, but the evidence is there.
[Nexus 7 (2013) General] tomvankirk:
Is the data use occurring on Wi-Fi, mobile data, or both?
[Nexus 7 (2013) General] Solaris81:
On the nexus 7 it was WiFi as i have the WiFi only device. On my HTC One X, it was mobile data as I have it set up to only display that. It was much less on the One X, about 5MB for the week, but that's a lot considering I had not been signed into Skype for well over a week at least. The problem being I very rarely restart my phone. Also I am on WiFi on my phone 95% of the time, at home and at work.
[Nexus 7 (2013) General] Solaris81:
Just a quick update. I checked data usage today after already uninstalling Skype so was using "uninstalled apps" to determine it was over 200MB usage, however I just remembered I also uninstalled an UNO game which I'd played for about 5 mins last night too, so that might account for a large chunk of that usage. I'll test one more time and make sure to get all the information before uninstalling. Then might make a topic specifically about Skype and what's actually happening here. Anyone with any suggestion where to post such a topic?
[Nexus 7 (2013) General] Solaris81:
OK here is the more accurate results of the Skype battery drain over night. This time I made a note of everything without uninstalling Skype first.

I installed Skype again yesterday, signed in, which used a bit of data to sync my latest conversations, then i clicked "sign out". I took a screenshot of the data usage at this point...

Just a short time ago I examined my phone to find this, as I'd expected...

I check data usage since the Skype install...

Here's the information when clicking on Skype...

I can confirm once again that Skype is nowhere to be seen near the top of battery stats, it's at 2% usage towards the bottom accounting for the 1m 21s of signing in and out again. CPU Spy is showing 96% deep sleep mode, the 4% matching the 22 mins screen time i have. But battery is down to 64%, and Skype has been sending over 1MB of data overnight.

So who thinks this isn't something suspicious going on here? Maybe some data gathering? Mic monitoring for certain words or terms? Then sending code back and forth? Wouldn't be so surprising in this day and age with all the NSA leaks. Either way I think this deserves a topic in itself, any suggestions of where to post it would be appreciated, as my same experience with the HTC One X, suggests this isn't simply a Nexus 7 (2013) issue.
[Nexus 7 (2013) General] Jimbode:
I don't know anything about the mobile version of Skype. How the Desktop version works is that there is no centralised server for routing traffic, never has been. It has always used clients to route traffic in a peer to peer manner. This was happening way before Microsoft got its grubby little hands on it.
[Nexus 7 (2013) General] tomvankirk:
Mods may object to it being posted in the general section but it will certainly get more visibility there.

Thank you for doing this research. Perhaps someone with more time and networking chops than I have can setup a packet sniffer and determine what exactly is being sent and to whom.

Since the bug on the nexus 5 that led me to suspect Skype in the first place involves activating the camera with the screen off, I suspect at least some imaging data is being sent.

I'd love to see this elevated and force comment from Microsoft and Google.
[Nexus 7 (2013) General] Solaris81:
Any particular moderator I should contact this about getting it posted in the general forum?
[Nexus 7 (2013) General] mrdeed:
Try disabling camera. This method has seemed to work for me and my battery has returned to normal.
[Nexus 7 (2013) General] C5Longhorn:
I'm having the same problem as reported here by others. Battery life really just started to suffer. I'm gonig to uninstall Skype tonight and see if that clears up my issues.

Thanks for posting the thread.

Rick
[Nexus 7 (2013) General] Mashari_F:
I have the same issue with my N7 2013, I leave it at certain % and when I use it after 3 or more hours it takes nose dive in battery %
[Nexus 7 (2013) General] MidnightDevil:
It's related to this bug:

Although it mentions "Nexus 5", it affects other Nexus devices, it's a 4.4.2 bug.

Solution: reboot after using the camera (directly or indirectly, such as through skype)

Solution 2: uninstall apps that use camera.
[Nexus 7 (2013) General] Solaris81:
Uninstalling Skype on my HTC one X also fixed it's battery problems and that's currently running 4.3.
[Nexus 7 (2013) General] qayak:
After reading this thread I uninstalled Skype to try solve battery drain. It seems to have worked. Before with Skype and no use nexus 7 would only last 12 hours minimal use. Without Skype so far 1 day 1 hour and still 75% battery huge difference.
[Nexus 7 (2013) General] C5Longhorn:
Uninstalling Skype seems to have improved my battery life significantly.
[Nexus 7 (2013) General] namhuy:
Happened to me too, there is a bug in camera in kitkat , Google search it and you will see. Restart your device, do not autorun or run any app with camera access, if you can disable camera service completely.

Nam Huy Linux http://namhuy.net
[Nexus 7 (2013) General] PeatCoal:
So I've uninstalled Skype and disabled location services and I'm still getting terrible battery life. 62% Android OS drainage (14h of keep awake), battery only lasts 24 hours with 20 minutes screen on time. Does anyone have any other suggestions?

I'm unrooted and would like to avoid a factory reset as much as possible - it's a big inconvenience for me, being unrooted and so unable to use Titanium Backup.
[Nexus 7 (2013) General] MidnightDevil:
You know you can unroot it... I think.... but I'm almost sure you can.
[Nexus 7 (2013) General] dakunclear:
Check what is causing the battery cause a factory reset won't necessarily give you better battery but you can try it also I recommend you downloading helium you don't need to be rooted for that app just need a computer.
[Nexus 7 (2013) General] PeatCoal:
How do I check what's causing the battery drain? Like I said, settings says it's Android OS. I can't use BetteryBatteryStats or Wakelock Detector because i'm unrooted.

Actually, I have helium, I'd forgotten about it. Thanks for the reminder.
[Nexus 7 (2013) General] dakunclear:
No prob usually it would tell you and the main cause is media something or other if I remember correctly what I ended up doing it just reverting back to 4.3 then updating to 4.4 which fixed my problem with battery drain and touch issues....so that might be an option for you to keep in mind but I think my problem started up cause I adb pushed the updates which shouldn't affect anything.

give that a shot if you want and I will look further into your issue and see if I can't find another fix.
[Nexus 7 (2013) General] PeatCoal:
I sideloaded the update too. So to revert to 4.3, I flash the factory image right? Which would end up clearing my data?