yashsingh1/xdaforums huggingface dataset:
[Nexus 7 (2013) General] Arthedes:
So heres my latest result. I had to stop here because settinfs stopped monitoring my screen on time after i hit 30%. Still, 30% left with 6 hours sot seems pretty good! I think I could hit (6*100)/70= 8.6 hours of SOT if we are to extrapolate the results so far. This is with pretty hefty browsing, youtube, facebook, voice searching (getting google now to do math for me) and xda. No gaming and no light stuff such as reading either.

I must say however that the battery drain while idle is very inconsistent.

If you look at my previous posts, you can see what im running, but heres a quick recap:

Stock 4.4.2 rom

Elementalx kernel (kept it as close to default as possible, disabled s2w and dt2w)

Greenified almost all google apps and then some.

Running ART

... I cant add photos...
[Nexus 7 (2013) General] Arthedes:
In reference to my previous post...
[Nexus 7 (2013) General] jalchemyst:
My brightness is always around 5-10%. Any higher and it hurts my eyes anyway. And my max is still 8 hours SOT.

For some reason though, after my last charge, I'm at 70% with 3 hours of SOT, with roughly the same sort of usage, books, youtube, manga, light browsing. So I should be heading for 10 hours (I hope).

THe store I bought the device said I can bring it in anytime to have it checked out, so at least I still have that option.
[Nexus 7 (2013) General] InfectedSoap:
I get about 10-12 hours of screen on time depending on how much I leave it in standby. Usually gets me through 3-5 days again depending on how much I leave it in standby.

I have wifi always on (connected 24/7) and the screen on auto brightness in a fairly dim room so it's probably around 20% most of the time. Mostly use my it for browsing and YouTube.

This is by using stock rom and franco.kernel before that I always had 6-8 hours SOT being unrooted.
[Nexus 7 (2013) General] bervin:
All of you guys with 8hrs SOT. Do you guys use s2w or d2tw?
[Nexus 7 (2013) General] jalchemyst:
Nope
[Nexus 7 (2013) General] InfectedSoap:
I tried it out but it would absolutely massacre the battery life so I wouldn't recommend it for any tablet user since it leaves the digitizer always on which would suck a lot of juice on a large screen. Using this could get me to about 6 hours SOT. Which can compare to 8 hours stock and 10-12 hours with franco.kernel.
[Nexus 7 (2013) General] sokinso:
I think we found the thing.

S2w and d2tw maybe it's the reason I'm getting only 5-6 hours SOT.
[Nexus 7 (2013) General] dakunclear:
I found taking off my moko case that uses magnets has greatly increased my battery life
[Nexus 7 (2013) General] bervin:
Do magnets cases really affect battery life? I always thought it didn't have an effect
[Nexus 7 (2013) General] jalchemyst:
My battery life has improved a bit all of a sudden. This was with a lot of video watching, at 2/3 brightness, quite a lot of manga reading and some Youtube/browsing.

To those who have no issues with battery life, do mt screenshots look normal to you? Thanks.
[Nexus 7 (2013) General] koller1994:
if u use stock images, the battery is really bad. Let's try to use custom rom and kernel and y will enjoy it
[Nexus 7 (2013) General] Arthedes:
With 2/3 brightness that seems pretty good.

Ive properly setup greenify and im currently in the process of undervolting (haha, get it? Currently? *ba dum tss*).

Auto brightness in a dim room with mostly browsing: 7h 30m. I do beleive i drained the last 30-40% with gaming though haha.

Still, heres some other results with a lot of gaming, benching, ocing and changing kernels: 5h30m

How much does yours drain idling? Mine properly goes to sleep now and virtually drains nothing. It doesnt even wakelock anymore.
[Nexus 7 (2013) General] jalchemyst:
I'm draining a bit more than I use to. I can't greenify system apps cuz I'm on art. Like 1% every 3 hours or so.
[Nexus 7 (2013) General] Arthedes:
Im running ART aswell. Check this app out: https://play.google.com/store/apps/details?id=de.j4velin.systemappmover

You can select any app and upon reboot its an user app. I used it to convert google search, play services and maps amongst others, after which i could just greenify them.

As you can see here, my device is properly asleep when the screen is off.
[Nexus 7 (2013) General] jalchemyst:
Could you tell me which ones you successfully converted? I tried converting some using titanium and that kinda stuffed a few other things up lol
[Nexus 7 (2013) General] sokinso:
So a little update.

Elementalx kernel but disabled s2w and dt2w

So I now get 10 hours compared to 5-6 before.
[Nexus 7 (2013) General] dbus08:
noticed battery was draining slightly quicker but didn't have any hard numbers to compare to pre update so i guess im not alone.
[Nexus 7 (2013) General] k3lcior:
Here is my battery life result:

I'd say 4 days and a half with 7+ hours onscreen time is not bad.
[Nexus 7 (2013) General] Arthedes:
Your wifi seems to turn on a lot when the device is in sleep. Why's that?
[Nexus 7 (2013) General] k3lcior:
I was trying to figure that out too.. (i suspect tapatalk or reddit news)
[Nexus 7 (2013) General] jalchemyst:
What was the brightness of your screen and what were you mostly doing?

Does anyone know how google measured their 9 hours SOT? ie brightness/video/browsing, etc?
[Nexus 7 (2013) General] k3lcior:
I use auto brightness through day and lowest for the night, mostly watched hd flash content in Dolphin.
[Nexus 7 (2013) General] iPWNtehNOOB:
My battery life has gotten terrible lately too :(. Most drain occurs in standby. Screen is always at 20% brightness. Running SlimKat with its default kernel.
[Nexus 7 (2013) General] cobyman7035:
Have u tried UV ing and underclock?

8hrs sot seems normal to me if u browse WiFi and watch some videos at 10% brightness

Via my NeXus™ 7 FHD on Tapatalk⁴ Pro
[Nexus 7 (2013) General] kingston73:
What I'd really like to know is WHY the F&@k do you care if you only get 8 hours screen time? I mean, who is using this for longer than 8 hours at a time?
[Nexus 7 (2013) General] dakunclear:
Much better idle battery after taking off moko case
[Nexus 7 (2013) General] kaz93:
That explain a lot. I also uses the same case and getting pretty much 6 hours screen on time. How the hell magnets affects battery life?
[Nexus 7 (2013) General] kingston73:
That's what I was going to ask. How does a magnet case change the power use?
[Nexus 7 (2013) General] jutley:
Magnetic polarity field interference.

A magnetic field can have unpredictable effects on an electronic device, as most electronic components are not affected by such a field. It is certainly possible for a strong magnet or a rapidly fluctuating magnetic field to interfere with certain components of a cellphone, causing it to drain power faster. However, a small magnet such as a magnetic clasp on a cellphone case is largely harmless.

Read more: http://www.ehow.com/info_12164672_can-magnet-drain-cellphone-battery.html#ixzz2r2hMgyxU
[Nexus 7 (2013) General] kingston73:
I'll believe it if anybody posts reliable evidence. Just saying "I took my case off and got an extra 2 hours" isn't reliable evidence. Also, the posted article isn't really saying anything about magnetic cases. And your quoted last sentence is arguing AGAINST a magnet case having any effect. So again, I'll believe it when I see some reliable evidence clearly showing a case being solely responsible for draining a battery.
[Nexus 7 (2013) General] dakunclear:
Give me a day or so then I will show you my results
[Nexus 7 (2013) General] Pandae:
You are completely correct. When it's known that li-ion batteries have very little material affected by magnetism, at least somewhat scientific testing is necessary, instead of gut feelings. For example, the 5-hour clip of He-Man "Hey Ya" song is a good way to measure time if one doesn't first run away screaming. :) It can be played on YouTube and also downloaded to play directly. Playtime should begin ASAP from a full 100% charge, in case the battery meter is miscalibrated and/or not operating linearly.
[Nexus 7 (2013) General] alas.holyweek:
I did some uv and keep all the defaut cpu ans gpu clock, and I use mine mostly at night so the brightness usually is all the way down.

No vids but I browse websites that have a lot of pictures. I wonder if that influences the battery life?

Well, yeah, as long as I charge it once per day. However, these considerable fluctuations in battery life among nexus 7 devices leave me quite perplexed and somehow discontent.
[Nexus 7 (2013) General] jalchemyst:
Well I managed to get my unit swapped. The guy at the store said he'll swap it this time, but told me that watching movies at 50% brightness, 5-6 hours is the normal SOT.

Anyway, hoping this unit will be different. Btw, forgot to mention that turning off USB debugging on my other unit increased my battery life a bit. Not quite sure why, but it did.
[Nexus 7 (2013) General] Arthedes:
Thanks, will try that usb debug setting!
[Nexus 7 (2013) General] bcvictory:
Is it possible you (or someone else) could put all the tips you have tried for better battery life into one huge post or a guide in a new thread? I think that would be helpful for alot of us with the same problem! Thanks!
[Nexus 7 (2013) General] dakunclear:
I'm going to give everyone a true way to make your battery life better without rooting or custom roms

Step 1. follow this http://www.cultofandroid.com/46632/downgrade-nexus-4-to-android-4-3-jelly-bean-from-kitkat/

step 2. follow this http://xdaforums.com/showthread.php?t=2429820&page=2
[Nexus 7 (2013) General] Arthedes:
Oops I fergot to post this result I got a week ago.

This is with ART and greenify. These are results with stock volts.

Its with normal to heavy use (chrome, tapatalk and even some benching). I was always using the screen and I did not use it lightly (i did not read e-books or use other light programs). Screen brightness was mostly at auto. In a dim room that equals 15-25% roughly.

I also want to share this result, which is with an untested undervolt:

This is from roughy 90%-15% with six and a half our of screen on time (+ 15-30 minutes it didnt record in the beginning, it does that sometimes), with even heavier use than the above result. More chrome, gaming, youtube, mxplayer streaming, music on the background etc etc.

Very happy with this result. Idle drain is fantastic as well; roughly 3% over a 24 hour period (not shown here, but i left my tablet idle for 24 hours straight and it dropped from 100% to 97%)
[Nexus 7 (2013) General] Arthedes:
Maybe this helps?

http://xdaforums.com/showthread.php?t=2615444

How to Greenify system apps when running ART

Please let me know if thats usefull to you.

Refer to my previous post to see what results i got with:

Root

ART

Stock OS

Stock voltages

Converting system apps to user apps (see link 1)

Greenify those apps (see link 1)

Im currently in the process of undervolting to squeeze all the juice i can get out of my battery. Please refer to this thread if you have undervolted yourself or want some info on that. http://xdaforums.com/showthread.php?t=2613515

Post your UnderVolting and OverClocking results!

I might eventually make a seperate thread with a comprehensive guide as to how i have got this fantastic battery life, but i want a stable undervolt first
[Nexus 7 (2013) General] jalchemyst:
Wow you sure have managed to up your SOT a lot. Will have to go back through your posts to see if there's anything else that I can do ^^

Just a quick note, what is your idle drain at around 40-50%? Because while at 99 or 100%, my device drains really really slowly is left as is, but at around 40-50%, its a lot quicker. over 8 hours last tnight, it drained 3% for me. Anyway, love your work in trying to get the best battery life possible.
[Nexus 7 (2013) General] bcvictory:
My results. Only went until 39%.

7 hours 34 minutes could end up being around 11-12 hours if completely discharged. I'm fairly happy with that! First time I've really gotten past 8 hours (just went past it then).
[Nexus 7 (2013) General] Arthedes:
Yes it is much better than what I managed to get in the beginning. There were so many programs wake locking that my wifi wouldnt even turn off.

I will monitor idle drain at 50% as well in the near future.
[Nexus 7 (2013) General] Arthedes:
I noticed something strange. I left my tablet to idle for about 20 hours when I see this:

After leaving it idle for around 8 hours (during my sleepy timez ?), I went to school without touching the device. It seems that at that time, the wifi turned itself on and started turning on and off at regular intervals. You can also see that the device wasnt even awake. I've noticed this once before, when I left it idle for 8 hours + as well.
[Nexus 7 (2013) General] jalchemyst:
What are your settings mate?

And OP, what do you think is the reason for your much longer SOT? From what I've read, you haven't done anything too drastic. Do you think its your combination of ART and greenify?
[Nexus 7 (2013) General] bcvictory:
Same as OP. Using ART, greenify and elementalx Kernel.
[Nexus 7 (2013) General] brenty108:
Nice one above. I get this kinda battery life by not playing any games.
[Nexus 7 (2013) General] bcvictory:
How much screen on time?
[Nexus 7 (2013) General] Arthedes:
Pretty much this. Im undervolted as well.
[Nexus 7 (2013) General] alasholyweek:
Guys, which gapps do you greenify? I am on stock and whenever I use app mover/titanium backup to convert gapps to user apps, I always get this "playstore has stopped working" the next time my device is on.
[Nexus 7 (2013) General] Kuniokun:
Today I had very good battery life with 10.30 hours screen time, with automatic bright. A played games and everything. Stock 4.4.2 no root. Usually I have 8 hours screen time.
[Nexus 7 (2013) General] brenty108:
Today. Just don't kill it and on full brightness and then I'll work fine and your gonna get good battery life.

Stock 4.4.2 non-gamer.
[Nexus 7 (2013) General] jalchemyst:
Happens to me as well......
[Nexus 7 (2013) General] Arthedes:
Last night it was at 54% and when i woke up it hadn't drain. I just came home from school and now it's at 53%. Practically, it doesnt drain noticeable in standby.
[Nexus 7 (2013) General] DonMigs85:
Just recently my idle battery life has gotten quite bad. The 2 most recently updated apps since I noticed the issue are Apex Launcher and Avast.
[Nexus 7 (2013) General] orangeju1ce:
What is ART?

I'm kind of new to this..
[Nexus 7 (2013) General] cobyman7035:
Google

Via my NeXus 5 on Tapatalk⁴
[Nexus 7 (2013) General] xfrancis14:
A different run time instead of Dalvik. It makes everything more buttery & smooth and can give better battery life. It can be enabled in developer settings as long as your on kitkat. Some apps aren't compatible with it quite yet though most are. And it also takes about 3 times longer to install apps and the first startup on art takes a very long time
[Nexus 7 (2013) General] _MetalHead_:
A lot of you guys are really lucky. I can get MAYBE 5-6 hours SOT on my N7, no matter what I do with it. I have it set up the exact same way as my Nexus 5 and Moto X and I get stellar life out of those devices. I went through 4 other N7s with dead pixels before I got this one, so I'm keeping it regardless. I just wish it had battery life that is consistent with tablets, and not smartphones. And my problem isn't wakelocks or anything like that, when it sleeps it SLEEPS. I can go to bed with 100% and wake up 8 hours later and it is still at 100%. But the moment I start doing anything- browsing the web, playing games, youtube... anything- it will lose 10% per 1/2 hr SOT. Methinks my processor is just eating up way too much power. It's not the screen because I have it set at just a hair above the lowest setting at all times. I think it's just something I'm going to have to live with.
[Nexus 7 (2013) General] Arthedes:
I dont have any antivirus programs because they eat too much battery. Give nova launcher a try if you have the time instead of apex. I don't notice any abnormal drain while running nova.
[Nexus 7 (2013) General] con100:
I wish I could get that battery life. I used to get pretty good battery life when I first got it but it's not that good anymore. I know it's probably an app but I don't feel like going through each app to find which one is killing my battery.
[Nexus 7 (2013) General] jalchemyst:
Can you tell me exactly what you've done for your idle battery life? I switched to Omni rom for its split view function, and ART, and I'm getting the best SOT I've ever gotten. Last I checked, I had 8 hours and still close to 20% left which is a record for me. But I think I tried disablong one too many services, which increased me wakelocks. Overnight, it drained 5%.

So anything you can share, ie what services you have disabled, what systems apps you have greenified, that would be awesome!
[Nexus 7 (2013) General] Arthedes:
http://xdaforums.com/showthread.php?t=2615444

How to Greenify system apps when running ART

The rest of my settings can be found in this thread :)
[Nexus 7 (2013) General] Viologen:
Try turning location off with Google play services
[Nexus 7 (2013) General] brenty108:
And finally today's results.
[Nexus 7 (2013) General] wm2001wm2001:
I have no idea if I'm the only one getting the worst level of battery life.

This situation actually starts quite early, even on 4.3, but I'm sure it's not from day 1.

Most of the power were drained in idle, the best I can achieve is about 1% per hour in history.

The snapshot below is taken with auto brightness, wifi always on, moderate use / video playback running ART on 4.4.2 stock with mod kernel

Greenify has been used.

Please help
[Nexus 7 (2013) General] skopje97:
the battery life form me is good. this device is very fast
[Nexus 7 (2013) General] JackHanAnLG:
Try re flashing stock 4.4.2 it should help

J
[Nexus 7 (2013) General] Arthedes:
Were you watching videos in MXplayer or something? As you probably have noticed, its pretty high up in te battery usage list.
[Nexus 7 (2013) General] Arthedes:
Just as i thought my problems were over, my tablet drains a lot now overnight.

Here i watched youtube for 2.5 hours, draining it from 100-75%. Then i went to sleep and woke up with 55% left

Maybe the battery isnt calibrated correctly? Ill try to see if i can reproduce this without watching youtube.
[Nexus 7 (2013) General] k3lcior:
What are your wifi settings, that keeps it off while screen is off?

For me it keeps waking up all the time, it's set to "Never".
[Nexus 7 (2013) General] Arthedes:
Its probably apps that are wakelocking your device and syncing.

If you look at my first post you see that i have had that occurring aswell.
[Nexus 7 (2013) General] jalchemyst:
Are there any video players that are known for using minimal battery life? For that matter, what about the browser as well.
[Nexus 7 (2013) General] Arthedes:
Nah, just greenify mxplayer and chrome and your idle life should be fine.

Be sure to greenify google now, google services and other google apps you see running in the background as well though.
[Nexus 7 (2013) General] bcvictory:
How do you convert google services to be a user app? The system/app mover didn't work. Same thing for titanium backup. Any ideas?
[Nexus 7 (2013) General] Arthedes:
If it doesn't work with the app, you can try to move them manually. IIRC there's a guide if you search for it on xda.
[Nexus 7 (2013) General] dawkon13:
:D

ROM 4.4.2 ART

kernel: Bulletproof
[Nexus 7 (2013) General] just lou:
FWIW, my N7 drains only about 2% overnight while in sleep using stock ROM and either Glitch or ElementalX kernel.
[Nexus 7 (2013) General] oakim:
Stock rom with ART has great standby time! With wifi!
[Nexus 7 (2013) General] brenty108:
8days!!!! Lol good for you man. Never made two :beer:
[Nexus 7 (2013) General] Pfeffernuss:
If your N7 can't last for two days while being idle something is seriously wrong.
[Nexus 7 (2013) General] brenty108:
No not while idle, with normal use a few hours a day and with some idle time I bet around 24 hours.
[Nexus 7 (2013) General] Redlugia:
Mine can last a week without charging. About 2 days under regular use I do keep brightness down so that helps a little. Relatively similar to any other version of Android if not better.
[Nexus 7 (2013) General] 99%:
The test result is really impressive...
[Nexus 7 (2013) General] slick_shoes:
Purity ROM, idle drain
[Nexus 7 (2013) General] AKShotgun:
Glad I'm not the only one with battery issues. I keep my brightness medium, location off, Bluetooth off. When I'm streaming a movie on it or watching a YouTube video my battery drains 1% every 3 minutes (not exaggerating). I just bought this tablet yesterday. Not satisfied.
[Nexus 7 (2013) General] just lou:
Agreed. Worst case scenario 2 days of idle should use no more than 25%. Most people would see less than 15%.
[Nexus 7 (2013) General] WhiteZero:
100% - 99% drain is not always indicative of true performance. I don't have a N7 yet (being shipped), but my LG G2 100% to 99% lasts MUCH longer than 99% - 0% when left on the charger for about 20min after Full Charge.
[Nexus 7 (2013) General] DonMigs85:
clearing the cache then signing out of Google+ seems to have fixed the issue for me.
[Nexus 7 (2013) General] dwegiel:
4.4.2 was awful on both my Nexus 7 and Nexus 4. Going back to CM 10.2.1 solved everything. Both devices have the best battery life I've ever seen and run flawlessly.
[Nexus 7 (2013) General] limzm:
Hmm, I don't see much of an issue here with battery.

On PURITY Rom,
[Nexus 7 (2013) General] md1008:
Battery life is usable but not what I expect out of a tablet. Seems my old nexus lasted a lot longer than this. Never used 4.3 on this as I just got this a month a go
[Nexus 7 (2013) General] roy5000x2:
No root/ROM on 4.4.2. This is just insane. I used it for all of 30-45 minutes in this 28 hour window.
[Nexus 7 (2013) General] acse1:
I had exactly the same issue on Rooted stock 4.4.2 with the first version of Google Experience Launcher (grabbed from nexus 5) installed.

My battery was steadily going down and i only got about 1 day and 4 hours of use in a charge and with little usage.

I installed Wakelock Detector to see what app was draining the battery but the results were inconclusive.

So far from this morning, about 8 am it is still 100%, so it i might have fixed the issue. Here is what i did:

1. Installed Google Now launcher from Google Play

2. Changed runtime from Dalvik to ART (apps open quicker :))

3. Discharged battery to about 1% and shut down the tablet

4. Charge over night with the tablet turned off.

5. Uninstalled Avast just to make sure it isn't draining the battery on the tablet (on my i9100G with CM11 avast doesn't drain the battery)

Hope this works for you.
[Nexus 7 (2013) General] roy5000x2:
Thanks for the tips man! I'll try them out and see if they work :D
[Nexus 7 (2013) General] tomo_s:
At the beginning I would like to say hello to everybody because this is my first XDA post. Moreover sorry for my english (this is not my native language). I hope my posts will be clear enough to understand problem ;).

I noticed that my nexus 7 (2013) has very poor batery life in deep sleep mode. During the night (8 hours) my battery state drops from 100% to about 80%. I have WiFi always enabled and I use standard google services (gmail, calendar, hangouts, store etc.) and Dropbox. BT and NFC are disbled. Location only by WiF without reporting. Exactly the same configuration and apps on Samsung Galaxy Tab 2 7.0 consume about 2% battery in the same period of time.

Similar battery usage is observed using the stock ROM 4.4.2 (KOT49H) and CyanogenMod 11 (official builds).

I have tried pure stock system without google account and without WiFi. In such circumstances baterry usage looks rather normal (1% per 8h) but It's not normal that i have to disable all services to have reasonable battery usage.

I saw many posts concerning nexus 7 (2013) battery issues but i couldn't find clear way how to fix it. Maybe this is hardware problem and I should send my Nexus to service?

Please find attached screenshots