yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] south69_dallas:
Great battery life so far and yea it seems to take forever to charge up, then than apps syncing etc I left it alone for a while and it'd only charged like 30℅
[Nexus 7 General] ketdizzle:
Mine has been great as well. Been playing games and watching videos and browsing. I guess the real life tests they did were accurate when they rated it at 9 hours.
[Nexus 7 General] Speeding Wheels:
Make sure you're using the Asus charger that came with your N7 to charge it.

The Asus wall charger puts out 5v 2A - most other chargers are only outputting .5A

My first charge took forever using an old Moto charger I use for other devices.. once I plugged in the Asus it's down to less than 3 hours for a full charge.
[Nexus 7 General] lyrad12:
so that means from zero (0%) to 100% fully charged how many hours of charging with the original charger?
[Nexus 7 General] Speeding Wheels:
about 3 hours
[Nexus 7 General] sRDennyCrane:
I feel much better knowing that I'm not the only one to have done that.
[Nexus 7 General] Ahmazin:
Battery Life is Far Better than expected

My battery life has been exceptional, which surprised me. I saw a youtube video where the guy from Cnet said he was concerned about how fast the battery drained. I don't know if he had a defective unit, but I've been pushing it pretty hard. Downloading apps, watching youtube videos, checking emails constantly and browsing the internet.

I've even used super video and overskreen to browse and watch a video at the same time. Still it last at least 8-9 hours. When on a long car ride, about 6 hours of constant use... Got home and it was at just under 30% battery left. This N7 is a BEAST!
[Nexus 7 General] RexBabbs:
Great battery life here as well. Just watched 4 straight hours of movies streamed from my HTPC using Air Video Server and Mirage player while out of town. Flawless.
[Nexus 7 General] neilrl79:
Battery life seems pretty good to me, pulled off the charger and used alot yesterday, mostly web browsing with screen set to it's lowest setting cause I was inside all day, timeout set at 5mins. I was connected to a weak wifi signal all day with gps on and bluetooth off.
[Nexus 7 General] Gunthermic:
can you imagine what the battery life will be when we get some cooked up roms with some tweaks in this beast!
[Nexus 7 General] 18t:
im happy with the battery life as well as the charge time
[Nexus 7 General] Nexcellent:
Battery life has been great, 8-10 hours, no complaints besides that it charges very slowly.
[Nexus 7 General] clockcycle:
I enjoy being able to put the tablet down and picking up the next day without it having been on the charger and see it only went down from 92% to 82%..

Last tablet I had, even turned off, it wouldn't have enough power to turn on the next day.

I am at 77% with 1d 6h 9m 5s..
[Nexus 7 General] CooLoserTech:
I could play hard all day, set it down late at night. Wake up in the morning and hop on. It has great battery life. About as good as my iP*d
[Nexus 7 General] thevuman:
8 hours 4 mins so far

27% after first full charge

Been using it fairly heavy with wifi on about 85% of time and browsing web, installing apps, playing around
[Nexus 7 General] TonyHoyle:
Pretty good, but slightly concerned google wallet is using 33% of the battery.. especially since we don't even have google wallet in the UK..
[Nexus 7 General] ateebtk:
It came with 40% charge. When I charged it, it was stuck on 96% for a really long time. Then as soon as I unplugged it, it showed 100% instead of 96%.

This happen to anyone else?
[Nexus 7 General] wtek:
Has anyone installed juicedefender? Would it be of benefit on this tablet, considering no mobile data..maybe managing wifi to turn on once in a while for data sync?
[Nexus 7 General] thevuman:
Ya, it did for me. Was stuck charging at 96% for hours! I took it off charge and it went to 97%. A half hour later, I put it back on charge cause I had to go to work, 3 hours later I come back and it's charged at 100%.
[Nexus 7 General] razball:
I think Google has that down my Xoom will last 3-5 days not on the charge and about 10-15 hours on constant usage
[Nexus 7 General] tomh1979:
I saw that a well and ended up disabling the app in settings.
[Nexus 7 General] LyghtSpeed:
epic battery life !

Its been sitting for 2 days, just with 1 hour usage !

Awesome !
[Nexus 7 General] ExploreMN:
Been using mine off and on the whole day.
[Nexus 7 General] badasscat:
The stat that really matters is screen-on time. Without the screen on, you're just talking standby time. Any *laptop* can manage 2 days of standby time.

I get about 6 hours of screen-on time with my N7... that's doing a variety of tasks. Slightly disappointing, honestly... i'd have easily taken a bigger battery and slightly thicker back for more battery life. Can't use this thing for a full day or evening without charging.
[Nexus 7 General] linkinparkfan007:
After 3 hours of screen on and 11 hours of use in total I have 44%left on minor use but usually it lasts me most of the day. Also using Franco kernel too :P
[Nexus 7 General] :
After my first charge of my Nexus 7 I got 10 hours to 80%, and after that 31 hours to dead battery (transferred a rom in between).

Very happy as it was my first use scenario so lots of wifi and usage, around 6 hours of screen on.

Rooted stock and motley's 1.1.1 with 520 MHz GPU and 1 GHz CPU underclock.
[Nexus 7 General] MRsf27:
Let me put out a question.... I'm using the Asus wall charger, but because the outlet is kinda far from the bed and I wouldve liked to plug it in and use a longer MicroUSB cord so that I can lie down and play games or browse and stuff, I used a longer USB. HOWEVER, it doesn't seem to charge the darn thing. Is their microUSB cord alot different then regular microUSB cords? it's kind of an annoyance but I'll live with it...
[Nexus 7 General] neotekz:
This is with 16 hours of idle with account sync and locations services on also with wifi on most of the time. Screen time is mostly using the browser and messaging on Skype. I'm running paranoid rom.
[Nexus 7 General] Harry GT-S5830:
this is my idle battery life (the bar not sudden plummet from YouTube :) )
[Nexus 7 General] AndrewAmazed:
I believe it is because the USB provided is a USB 3.0 cord rather than 2.0, allowing for more power while charging, thus quicker.

Also I heard that because of this, the USB 3.0 cords are limited because of this are therefore shorter as well.
[Nexus 7 General] crazygameofpoker:
At one point last week, mine had been running on eight hours from a full charge, screen had only been on for 1:15 and Android OS had kept the device awake for almost five hours, and used 50 minutes of CPU total. My battery was at 71%.

After receiving advice to do a factory reset, I did so on Friday and my battery life improved dramatically over the weekend. Android OS was using a much less percentage and keeping the device awake less. My battery lasted over two days with +4 hours of screen time. But once I commuted to work this morning, my problems started again. Android OS' percentage used and time kept awake shot up and my battery is down to 71% in 19 hours (56 minutes of screen time) and Android OS has kept the device awake for almost 4 hours.

Is this an operating system problem? Does anyone else commute to work and use Google Now for public transit updates?

I am absolutely baffled and would love some help. Thanks in advance.

Edit: I have Latitude updating off but otherwise all GPS, etc. is turned on.
[Nexus 7 General] ecko72:
the battery life on my nexus is great. love this tablet
[Nexus 7 General] MRsf27:
That explains it... funny how I can still upload stuff from my computer to the n7 with the USB 2.0
[Nexus 7 General] neotekz:
I have a USB 3.0 extension and will try it with the Asus USB tonight to see if it will work. There's no micro USB cables that are longer than 3 feet? I can't find any on amazon.
[Nexus 7 General] MRsf27:
I bought a micro USB cable 2.0 that is 6 feet long... only cost 14$ from tiger direct
[Nexus 7 General] Zargon335:
$14? You can get one from Monoprice for just a few bucks.
[Nexus 7 General] savalangh:
My battery recently stays on 100 since screen was switched on just around 1 hour and then starts to drain quickly -about 15% per hour for normal use, browsing, Google reader and etc.- I'm on stock Rom, what's your opinion? Is there something wrong ? Do I need to wipe battery stat or just leave it?

Thanks in advance for considering me
[Nexus 7 General] bmbrad:
Do you have location and NFC on? My first charge on my nexus 7 I got 1 day and 23 hours with 8 hours and 20 min. Of screen time on. It was still at 11% With auto brightness and WiFi on. I'm stock and don't think I'll change cause I haven't seen much get over 5 hours of screen time on any Rom or kernel.
[Nexus 7 General] savalangh:
Thanks for reply :)

Location is on, but the question is why it last 1 hour without even 1% battery drain and then drains faster?

Does your device really work more than 8 hour with auto brightness and wifi on?

I use auto brightness rarely and have a profile in tasker to turn off wifi while I'm reading ebooks, but I haven't ever reached even around 8 hours.

By the way I realised that Google chrome drains too much battery, I'm not sure if it's for syncing with my desktop chrome or not.
[Nexus 7 General] bmbrad:
I got my nexus last Thursday. I am on my second charge. I'll let you know what I get this next time since its hasn't been used a lot on this second charge.

Yes I did get 8 plus hours of screen time. I haven't used it without auto brightness yet. I'm assuming I would get longer use if I did.

Another thing that might be eating your battery is Google Now. I haven't turned it on or even enabled it yet. I know people have said its a battery eater. Did you turn off your NFC ?

Yeah well that was my first charge. I charged it right away after I turned it on.fully discharging lithium ion batteries just makes them worse after your first 3 or 4 cycles of fully charging and discharging. I don't let mine go below 10% after that.
[Nexus 7 General] savalangh:
Yes I turned off all of those things and test it again either with and without auto brightness on.

I have a battery monitor apk, it shows 7 hours remaining while screen and wifi was on around 3 hours but without auto brightness, fingers crossed, let's see what's going on :)
[Nexus 7 General] Southrncomfortjm:
I get great battery life on my N7. I can get about 7 hours screentime even when most of that is using Onlive (so, screen + constant wifi). Without using Onlive, I can easily get 9 hours. Idle time is great too. Easily get over a week of time on it with small amounts of use.

Also, I noticed this crazy thing. Since I got my N7 my Galaxy Nexus can now last over up to 2 days without a charge! :D
[Nexus 7 General] Dorkington:
8-9 hours of screen on time here at the most. (ie reading comics and doing little else)
[Nexus 7 General] el_abuelo_sv:
Enviado desde mi Nexus 7 usando Tapatalk 2
[Nexus 7 General] viera_ritz:
I personally have not had a chance to work with my nexus longer then a few hours due to work but my wife uses it non stop all day playing games browsing the net listening to music and I get home and its still over 50% this things battery is great :)
[Nexus 7 General] 3vo kid:
13hrs since last charge. Used for about 3 1/2hrs (gaming, YouTube, xda posting, Web browsing, downloading apps, and reading manga) battery at 68% with auto brightness and wife turned on.

Sent from my Black "Destroy Mode" Nexus 7
[Nexus 7 General] philliplavelle:
Am I the only one who did a little s****** at that typo then? :laugh:

---------- Post added at 12:18 PM ---------- Previous post was at 12:16 PM ----------

Oh my gosh - I just typed a word that rhymes with trigger and is used to depict a giggle or snort.. and it has been starred out as a swearword. I assume because if you take the first letter (s) away, it becomes a racial insult
[Nexus 7 General] nhoccontw:
Normal I use it for 1.5 day. Not much and good but it can take I don,t worry about battery or charging when I use playbook before:D
[Nexus 7 General] 3vo kid:
Haha I didn't even notice that! But that's funny as hell, I think I'm gonna leave it like that even tho I'm not married lol

Sent from my Rooted, LazyPanda, White "Destroy Mode" Evo
[Nexus 7 General] scarcry:
LOL could be the same for me but I still play plenty with my Galaxy Nexus
[Nexus 7 General] muimui725:
Pretty good
[Nexus 7 General] PhilipL:
Hi

I see this with my HTC One X.

Basically it is because 100% doesn't represent a full battery, it represents an almost full battery, so when you fully charge you are over 100% and it takes a while before the level starts decreasing from 100%.

They do this because of the why Lithium batteries are charged and to stop complaints from customers. Lithium batteries can't be trickle charged, so once fully charged they stop charging, this means the battery starts to discharge powering the device even when still plugged in to the charger. Eventually the power drops enough for the charger to turn back on and top the battery back up to full, this repeats itself until you unplug it from the wall.

The issue with using 100% correctly, i.e. when fully charged show 100% and not before, is it starts to look like your battery isn't charging. For example, you've had it on all night charging, and because it reached a "real" 100% at mid-night and then stopped charging, when you look at it 8 hours later in the morning it is now showing 90%, and that looks like a problem with charging.

This also means you can get a variable capacity, as depending on how long you had it charging, and how long it was discharging when you take it off the charger, your battery might be anywhere between 90% and 100% of true capacity, but will still indicate 100% on the display.

This issue is evident on virtually all equipment using lithium style batteries to a greater or lesser degree.

Regards

Phil
[Nexus 7 General] duynguyenle:
I usually spend between 1-3 days between full charges, with screen time between 7-10 hours depending on what I'm doing.

A couple weeks ago, I was on a 12 hour flight, during which I watched the whole first season of Continuum (10 episodes of 45 minutes, totaling over 7 hours of 480p H.264 video, plus some light reading on Kindle), and when I landed, it still have 22% on battery. Very happy with battery life so far.
[Nexus 7 General] expos:
Display time is around 4-5 hours, with Wi-Fi on and auto brightness. I always play game and web browsing, running sgt7 build 5
[Nexus 7 General] ace9988:
I did this two ways

The standby time of the Nexus 7 from 100% - 0% was roughly 6-7 days, even with brief checks on gmail and google now and news. Very very limited use though

the other was my usual use (games gmail video splashtop tapatalk, music etc etc) and at the end of the day it was 40%.

Using the Modaco ROM JR7 and re-calibrated the battery after reaching 100%
[Nexus 7 General] thevuman:
Same for me. Stock everything but wifi on pretty much all the time, unless it's sleep, and auto brightness. I get usually 5 hours when I get to 15% screen on time.
[Nexus 7 General] muimui725:
which rom/kernel are you using??
[Nexus 7 General] ranchlizard:
Ditto. I almost always average 5 to 6 hours of screen on time by the time I charge it every night.
[Nexus 7 General] parmend:
Man I'm lucky to get 5hrs of screen time . Thats been my only gripe is that the battery life isn't that good at least for me. My evo lte got almost 5hrs when on WiFi all day and the battery is half the size of the nexus . Maybe I have something running in the backround . I'd love to get 7hrs + on this thing .
[Nexus 7 General] r0zj0k3r:
I get about 7 with wifi and web browsing. If flash is involved I get maybe 5-6. It seems to do best with video playback or ereading. With hd video playback I get a near 9 hours of solid usage, with brightness at 10%.

As a side note: Hd playback seemsto suffer from a significant but not unbearable amount of stutter. At its best for me, there was slight audio stutter every 30secs.:eek:

Pictures:

I know it's not a full discharge but with some quick math, this charge would have lasted 9 hours. Besides 4 movies in a row was too much anyway:cool:.

Caveats: airplane mode, must be h.264 (m4v/mp4), mxplayer with hw decoding, software decoding sucks down some serious battery
[Nexus 7 General] superleeds27:
Im using CM10 and Trinity Kernel, both latest versions.

As of now these are my stats.

Screen on 3 hours

20 Hours on battery, with 16% left.

Seems rather poor to me, or, is it?

Im not sure?
[Nexus 7 General] Benjamin150:
That's pretty much how my battery life is too. My video playback in HD, as well as audio plays perfectly though.

I'm on CNA with Trinity kernel.
[Nexus 7 General] megacoolrock:
I used mine almost non stop and got about 9 hours
[Nexus 7 General] RBFesquire:
This is probably my best stats. Bloody volume in the way but I think it was over 16 + hours.
[Nexus 7 General] DanielEGVi:
What app are you using in the notification bar for battery percentage?

On topic:

While traveling, I surfed the internets for some time via tethering and then played Minecraft Pocket Edition for a veeery, very long time. At the end, I took a screenshot of battery use just in case.

Boy, that game is addictive as ****.
[Nexus 7 General] timfimjim:
My battery's pretty good, better when using a stock based rom and trinity kernel
[Nexus 7 General] nextelbuddy:
I just dont understand it.....

i have my Wifi set to turn off at screen off.

i have reduced the amount of google syncs down to just calendar, gmail and contacts

i fully charge the N7 and pull off the charger.

let it sit by itself with out touching it at all and 2 hours later its down to 97% and i havent even touched it.

what gives?

my freaking ipad can be show 57% and if i leave it idle for a week (5 days later) and pick it up it still shows 57% and i still get all notifcations on it triggering an maybe it drops down to 56% after as min or 2 with playing around.

why is android idle battery life so bad?

i have the same experience with my Asus prime and Samsung Vibrant and Galaxy S2 Skyrocket.

i have tried new kernals, CPU SPY, Better Battery stats all which dont show any abnormal drains or processes and showing proper deep sleep yet still battery never stays at 100% when you leave it idle.

is this just normal android and how things are and people accept that and its fine?
[Nexus 7 General] ÜBER™:
Dont compare android to iOS please... two COMPLETELY different OS's.

Second if you have something syncing.. or if you would show us your battery graph we could help determine what is causing this drop. mine wont drop unless im using i let idle for around 8 hours never dropped a percentage. Then started playing with it dropped a %.
[Nexus 7 General] el_abuelo_sv:
https://play.google.com/store/apps/details?id=com.fulminesoftware.batteryindicatorpro&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5mdWxtaW5lc29mdHdhcmUuYmF0dGVyeWluZGljYXRvcnBybyJd
[Nexus 7 General] r0zj0k3r:
I see the same results with my Nexus 7. I have also tried multiple kernels and ROMS with all the same results. I believe it's just a sign of immaturity with Android development as a whole. I still really like my Nexus but I just take it with a grain of salt. If I want extreme battery life while suspended, someday maybe I will spend the 500 plus and buy an iPad. I'm more upset that google claimed 10 hours of web browsing when nobody has gotten much above 8, if that. On my best day right after a full charge i might get 7 hours of web browsing. Video playback is actually decent, as I can pull a solid 9 hours of playback.

I will say that my galaxy s 4g gets very good idle battery life. I can leave it on idle for days only losing a couple percent.
[Nexus 7 General] Toast95135:
Keep in mind that when it shows 100% full most of the time it's not really fully charged. When you have it plugged in it will charge up to full, then stop charging for a while until the battery level drops down, then start charging again. It may show 100% but it's really 97% and it takes a little while to show it.

Also there's a lot more going on in the background compared to iOS, all the apps you have set to sync, Google Now, widgets etc. Personally I wouldn't have your Wifi set to off when the screen is off... Why? Because there are things that need to sync and usually it'll take a second or two to do it's business while you have the screen on or right after it's turned off. With having the wifi turn off when the screens off it'll have to sync more at once and will keep it from going into deep sleep as soon and your battery life will suffer.
[Nexus 7 General] DroidDioxide:
Amazing! At least 24 hours with heavy usage!
[Nexus 7 General] nextelbuddy:
sorry but i have to compare the 2 when user experience is different but expectation is the same.

can you please tell me what kernel and rom combination you are running?

i have tried many combinations on all 3 of my devices and even reverted back to stock and all had same or similar battery drains at idle.

if i have WIFI off when screen is off and i don't touch the device for 2 hours after removing it from being fully charged.. i expect to be still at 100%. there's no excuse after 2 hours to be at anything less than 100 if the devices are deep sleeping properly.

the battery graph is not going to show you everything and thats nill.

i mentioned before that I use better battery stats AND CPU SPY. both show my device in DEEP SLEEP for the 2 hours or even 8 hours the device has been idle and still there's battery drain from 100 - 97% etc after a few hours of idle time.

better battery stats shows NO wake locks kernel or partial so it makes no sense.

if you tell me that you charge your android device to 100% and then pull the charger off and your wifi is set to be off with screen off and you don't touch it for lets say 4 hours and you wake the device and yours still shows 100% then i would say i have a tough chance believing that and would like to see a screen shot showing your battery stats page that shows the 100% stat as well.

my iPad can show 100% (maybe 99%) after a week of idle time so there's no excuse for an android device setup very similar to it as far as syncing settings and notifications etc to show 97% after 4 hours of idle time.

it all boils down to superb user experience and no one wants to have battery drain on a stock device out of the box that cant even hold 3% of battery at idle for 4 hours when the device is in supposed "deep sleep"

---------- Post added at 02:43 PM ---------- Previous post was at 02:39 PM ----------

if that's the case then android should have a master thread running that its only job is to say wifi is on or wifi is off and all apps should be coded to look at that master thread and if it says wifi is off then it will cease all attempts to sync instead of keep trying to sync against a disabled wifi draining batter even more.
[Nexus 7 General] kingofcomedy:
My battery is not really good. Right now the nexus 7 is disconnected for about 38 hours and the screen on-time is about 1:33 hours, but the battery is at 28%. BetterBatteryStats shows nothing really negativ.

Just to compare: my "old" Galaxy Tab 7.0 Plus N (with ICS 4.0.4) has a screen on-time about 2:21 hours and the battery is at 16%. But it is disconnected for about 326 (!) hours now.

https://www.dropbox.com/s/santx8y0vh11r6z/Screenshot_2012-09-18-20-58-26.png

https://www.dropbox.com/s/b3xybjt799uo3u5/Screenshot_2012-09-18-20-58-32.png

https://www.dropbox.com/s/1ef9ffma8l2tnep/Screenshot_2012-09-18-20-58-52.png