yashsingh1/xdaforums huggingface dataset:
[Nexus S General] Lxus:
My result after a little trip to the neighbour city today:

unplugged

-20 mins home and controling the media player over wifi

-1x SOD

-40 min in total running Navigation with Music Player in background

-always checking stuff, writing in whatsapp and facebook, checking bus with gps locations etc.

-and 2% display brightness (wish it could be darker or the custom auto brightness like in CM7)

-deepidle on, no OC/UV,lazy

Got to wait for a daily-drive-day-result (!) for a better comparison with GB - but i noticed the average were: 40% Android OS and about 20% display
[Nexus S General] LordLugard:
Yeah, the battery life on ICS is disappointing really. Recently moved onto an Epic Touch and I might not be coming back anytime soon.

What shocked me the most was I put the NS4G in airplane mode fully charged and came home and a quarter of the battery had been used up (by Android OS).

I almost wonder what the big deal about ICS is really. It's a hair less responsive than GB to be honest even after I turn off all animations.

Sent from my SPH-D710
[Nexus S General] deani77:
Stock ICS 4.03

My battery actually quite good. I can get more than a day with single charge.
[Nexus S General] Symos:
As I mentioned in my previous posts, I too got disappointing battery performance after upgrading to ICS. After experimenting with a different kernel to no avail, I decided to reflash the stock ICS rom.

But this time, instead of flashing the same file (VQ8PQk_V.zip) I flashed another file that I found mentioned in this forum (ZD3PyN0t.zip), which is also hosted at google servers.

When I first booted the phone, the battery meter started going down like crazy. So I fully charged the phone and wiped battery stats. I booted again and then BANG! Battery life skyrocketed to levels I hadn't even seen with my old phone!

Look at the screenshots, I got 3,5 days with the first charge and normal usage and now on the second charge, I'm at 4 days with 26% still left!!! (although admittedly this time I haven't really used the phone besides some calls and a bit of wi-fi).

As far as I have searched, I haven't been able to find out what's supposed to be the difference between those two rom versions. All I know is the second one is magic!

P.S. My phone is the GSM version with S-LCD screen.
[Nexus S General] Greenthy:
Well you didn't google hard enough :)

http://xdaforums.com/showthread.php?t=1063664

V... = 2.3.6 to 4.0.3 incrimental update

Z... = 4.0.3 full rom

Basicly you got a clean install vs an old updated one.

I'd have a fair guess that's what improved your battery life :)
[Nexus S General] Symos:
I think I performed a full wipe before flashing both roms so in theory both installs were (equally) clean. I might be wrong though.
[Nexus S General] davidsteele1975:
Something chewed through my battery this evening. I can't upload an image, but I have plenty of device usage with the screen off.

The thing is that this is repeatable. Basically, I use the device on the bus on the way home from work and for the evening, this destroys the battery. That's twice.

I think that both times this happened to me, I turned 3G and AutoSync on... I need more time with it.

By happy coincidence, I'm borrowing a Galaxy Nexus and I'll see if that has the same issue too...
[Nexus S General] evcz:
How did you flashed the other Rom? From clockwork doing a wipe system, wipe boot and then install zip from sd card?
[Nexus S General] skatastamoutrasas:
Personally, I'm returning back to a custom CM 2.3.7 version. Enough is enough for me. When this - so huge - Google company realises the problem and gives a fix, I might consider returing. Until then, I don't give a rat's ass about the new UI.
[Nexus S General] Soy_Filipo:
I hate you so much... do you know if there are any custom roms based on that release?
[Nexus S General] davidsteele1975:
I don't want to remove my bootloader... But I'd also be tempted to go back to 2.3.x.

I find that logging out of Google+ has made the difference to mine; I'm looking at 48% remaining battery, two hours of screen on time and fifteen hours since off charge. I've my modem on all of the time and I use Wifi when I want and can, I'm running Latitude all day and make just a few minutes worth of calls and a few text messages. That's lightweight use for me, but I'm happy with battery life.
[Nexus S General] raeef:
Do you use G+, Currents?

I have the feeling that some of Gapps are causing the drain.

Did you restore your account after the new installation ? All previous apps?
[Nexus S General] evcz:
This morning I wiped system, boot and cache

Preserved data.

Then flashed the full rom... Nothing changed... Android os is still reporting large use of battery... I can therefore confirm that this is not a rom issue but rather something with the settings/apps
[Nexus S General] ElMango:
Battery level: 4%

Android OS: 43%

VQ8PQk_V.zip
[Nexus S General] philosopherssage:
I too had issues with battery, I had originally flashed VQ8PQk_V.zip, but I just cannot leave well enough alone and totally F***ed it up an back up would not load due to checksum error so I flashed another file ZD3PyN0t.zip that I found at http://xdaforums.com/showthread.php?t=1063664

It has been 3 days and all seems normal! battery will last like it used to under 2.3.6 :)
[Nexus S General] davidsteele1975:
The calculated battery usage figure is onky a small part of the story. How well didbyour battery last in terms of screen on time?
[Nexus S General] evcz:
2hours on a 24hours timeframe

Betterbatterstats was reporting a 4hours android is awake time and just 2hours of screen on :-(
[Nexus S General] haturaya:
VQ8PQk_V.zip vs ZD3PyN0t.zip - can we compile some information regarding this release. Full ROM vs Update. Seems Full ROM gives better milage than update one.
[Nexus S General] Bls440:
Based on my own investigation on this forum, indeed it seems that the full rom (Z file) gives overall better performance / battery life.

I'd like to personally give it a try but I can't navigate through recovery (I'm using the bright lamp technique but can barely read what is written on the screen)
[Nexus S General] skatastamoutrasas:
Hey, how do we fix the recovery issue? Because I tried to see my options with a lamp, without success.
[Nexus S General] Bls440:
I've been trying for 30 mins and finally made it work. Just use a very bright lamp and find the right angle and you will see it. It's not easy though ...
[Nexus S General] evcz:
and from my own tests I can see nothing changed comparing the 2.3.6->4.0.3 upgrade to the full rum installed in a clean /boot and /system environment...

(/data was kept intact... so same apps and same settings on both roms installs...)
[Nexus S General] Bls440:
Guys, just to bring my feedback on this. I was having battery life issues following the update to ICS.

This afternoon I've done a factory reset/wipe (as well as a cache partition format) on my i9023. Then I've installed ICS using the ZD3PyN0t.zip file.

So far this looks much better than the previous installation. On battery stats, Android OS uses 5% instead of +20% before. Battery Life seems to have improved.

Wifi, GPS, NFC are disabled. Google sync is activated but only for contacts, Gmail and Music.
[Nexus S General] helpbygrace:
Current :62

Android OS : 16
[Nexus S General] evcz:
I did the same but without factory reset and it didn't help.

Anyone else confirming a factory reset is needed? :-(
[Nexus S General] raeef:
Why are you having problems seeing the recovery menu ?
[Nexus S General] Urbanrootz:
Current - 70%

Android OS - 28%
[Nexus S General] skatastamoutrasas:
Yes, totall black screen. I've been tryinh with a bright light lamp but, I haven't manage to see anything. I wonder if there is a way to flash everything from PC or at least something else because I really don't know what else to thing and, I don't have a brighter way of getting light.
[Nexus S General] Bls440:
Keep trying with different angles (do not point the lamp directly on the screen). After you select "recovery", when booting, you should see the Android warning in the middle of the screen pretty well. Then, hit the power button + vol down and the recovery options should appear at the top left corner, so you may redirect the lamp again. Again, it's hard to see but it's doable!
[Nexus S General] mindwalkr:
I've done a factory reset on my updated ICS (VQ8PQk_V.zip) and it didn't help. Battery still sucking...

I need to install the full rom and do a factory reset and see what happens...
[Nexus S General] Bls440:
Do it. I can confirm this is much better for me. I went to bed with a 75% battery remaining and woke up 8 hours later with 72% left. Previously, with the OTA, I was losing 10-15% !
[Nexus S General] msnxda:
After a factory reset and disabling Google+ the battery life of my nexus is better then ever.

Normal OTA with i9032 phone
[Nexus S General] pesche80:
Open up Camera app and close it, just after a reboot.

seams to help :)

http://xdaforums.com/showthread.php?t=1367341
[Nexus S General] Greenthy:
A quick question for all following this thread:

* Are there ppl with VQ8PQk_V.zip (update) who are NOT having the battery drain ?

If so post, and plz give your max discharge time.

* Are there ppl with ZD3PyN0t.zip who HAVE the battery drain ?

If so post, and plz give your max discharge time.

Because after skimming through this thread, it seems it's mostly the VQ8... users that have the issue.
[Nexus S General] haturaya:
Agree with you. It seem that ZD3PyN0t.zip (Full) doesn't give much battery trouble compared to VQ8PQk_V.zip (Update)...
[Nexus S General] evcz:
I tried both and couldn't see a difference between them.

Now I'm running Eugene speedy3 kernel and finally having good battery performance

(it charged itself tonight while being "offline" lol)

Sync enabled:

3 google accounts

3 twitter accounts

Whatsapp

Gtalksms

Facebook

Facebook messenger

G+

On the 160mb rom, not the update

(was running the update, just wiped boot, system and cache the flashed the full zip using cwm)
[Nexus S General] raeef:
I did a full wipe and flashed the full ZD3PyN0t rom

and I think I saw improvement, I didn't get more than 6 hours with the OTA

today I got more than 12 hours. Data and skype were on. Screen time on was about 2.5 hours. I disabled g+.
[Nexus S General] evcz:
ended that previous charge with 24hours runtime (6 of which with the phone offline), 4h:15m screen on
[Nexus S General] iHeadhunterz:
I get around 8hrs on GB in semi heavy usage. I get 5hrs on ICS
[Nexus S General] jangozo:
How exactly do you disable G+? Do you mean G+ sync?
[Nexus S General] raeef:
No, go to manage apps, look for g+ click on it. you will get the option to disable it.
[Nexus S General] raeef:
Performance after the full wipe and using the full stock rom

U used to get like 6 hours of awake time and more for android os
[Nexus S General] jangozo:
Thanks, I'll see how it affects my battery life.

Before I made the change I used to get 20+ hours on the VQ8PQk_V.zip .
[Nexus S General] khtaam:
I managed to reduce keep awake time for Android OS by accident, so I am not sure what change really made the difference and I haven't had time to test it further.

The changes I made are:

1. Left GPS on

2. Changed wallpaper to png image from jpg

3. removed analog clock widget

after 4 hours on battery from full charge listening to podcasts for 2.5 hours battery is at 65%

Mediaserver used 35%

Cell standby 12%

Screen 6% Time On 15 m

Android OS 4% with keep awake 19 m

Also have to test if this improves battery life, but I wanted to share this if someone wants to test.
[Nexus S General] yougotcut:
Battery: 78%

Android OS: 32%
[Nexus S General] Bruce-Wayne:
Stock ICS seems to really garble battery.

I extended my life substantially by using GlaDDoS and Deep Idle.

With everyday usage, emails, Skype calls, and some surfing - Airplane Mode - and Deep Idle while I was sleeping, I got about 26 hours before having to charge.

I got a further couple hours by underclocking and volting my processor using NSTools.

Going to flash to a new ROM and kernel later tonight and will do some testing with real world usage.
[Nexus S General] TheLastMirana:
Agreed thats why i went with matr1x kernel
[Nexus S General] blackhemi4x4:
Before androidME, I was one who was getting 5-6 hrs max out of a charge. Greatly improved now
[Nexus S General] spaz2k7:
battery 72%

android os 15%

I personally do not find the stock 4.0.3 to bad on battery. over the weekend I got 3 days and I still had 35% battery left.
[Nexus S General] zlwu:
Battery level 63%

Android OS 34%

Brainmaster AOSP ICS
[Nexus S General] haturaya:
Manage to clocked 1.5 day with full ROM ICS (Z**.zip). Similar performance with Gb. :D
[Nexus S General] rosms:
using speedy 3 kernel improved my batery life by quite a bit regarding the rom i use. the deep sleep option really helps alot , my phone is sleeping like a baby
[Nexus S General] raeef:
I don't understand, it seems that some apps/ settings cause the drain. When I flashed the stock full rom I was happy with the battery life for like 1 or 2 days. After that, keep awake for Android OS started be a problem and battery drain is back again. I am now on stock with Matrix 14 kernel. I hope this will be a good combination.
[Nexus S General] Skyap:
I used the Z... file which as I was going from 2.3.3 (I'd just got the phone as a replacement) said it was an update, it has the same file name as the full rom though.

I just applied it using stock GB recovery - should I have done anything special? My battery lasts barely 5h without charging. I need to plug it into my USB at my desk to get through the day, and that's without using it much.

Would there be any benefit in trying to re-flash it?

I hear 4.0.5 is coming out this month so I was thinking of waiting for that.
[Nexus S General] gialakias:
Battery level 63%

Android OS 21%
[Nexus S General] Skyap:
I turned off NFC and have seen an improvement but Android OS is still really high.

Battery 46%

Android 61%
[Nexus S General] gialakias:
I use stock 4.0.3 rom to which I upgraded from 2.3.1 manually.

I usually get 30-36 hours with light to medium use with Wifi and 3g always on . Below is one of my best days!
[Nexus S General] SujayKrishna:
Can someone help me understand why Android system takes up most of my battery? (66% :mad:) And also some guidance on how i can get more battery?

Thanks,

Sujay
[Nexus S General] spotless1212:
improved battery

hey guys, after putting in Wi-Fi and setting screen brightness to auto, I noticed my battery has improved. thanks a lot for the tip : )
[Nexus S General] atl4ntis:
With data always on, toggle 2g3g and deep idle kernel and a pretty heavy usage my battery last 2days+
[Nexus S General] tjackbjorn:
That's sick man. Do you have a extended battery man? if not, please post a screenshot on your screen on time and share your rom/ kernel settings :)

Sent from my sandwich using a Nexus S
[Nexus S General] atl4ntis:
I'm using a stock rom resigned to work with toggle2g from TheMasterBaron plus Matr1x kernel cfs 19.0 oc to 1200 and bln bld deep idle active. Screen time around 3 hours atm. Also have 120 apps installed but always make sure to not have much junk running in background preventing a good idle. Using smartassV2 + noop and stock battery.

Edit: think toggle2g makes the difference cos i'm pretty much always connected to wifi so it sets my radio to 2g.
[Nexus S General] alexfiorani:
Battery level: 81%

Android OS: 04%
[Nexus S General] kooru:
Battery: 28% after 19 hours

Android OS: 33%
[Nexus S General] gogol:
@poid,

I hope you are not mistakenly stated the Android System battery stat, because that one is low, mine at 2%.

We are checking the Android OS, and not the Android System.

How is the Android OS Keep awake time amount?

Hope you also have BetterBatteryStats to get list of the partial Wakelocks and kernel Wakelocks..

Still, almost unbelievable, you are the only one so far...
[Nexus S General] poid:
Nah mate, its definitely Android OS. My Android System actually sits a few percent higher than Android OS.

Android OS keep awake right now is 15m 5s. Battery is 68%, 18hr 15m and Android OS 5% (Android System 8%)

I dont have BetterBatteryStats.

I am hoping that this continues and isnt just a freak occurrence.
[Nexus S General] nandihno:
For me battery is so much better used it normal usage 12hrs usage and 29% left haven't charge at all is doing lots better than gingerbread ever did
[Nexus S General] BullHorn7:
Battery percent: 76%

Android OS percent: 30%

After upgrading to ICS, my battery's life when down by almost 50% from ~30 hours to ~14 hours.. :(
[Nexus S General] beagrie:
Battery: 74% (2 hours from full charge, most of which spent in standby)

Android OS: 42%
[Nexus S General] gogol:
Guys,

if you have this issue, please star the Google bug tracking below:

http://code.google.com/p/android/issues/detail?id=22878

Originally was reported as ICS issue on Galaxy Nexus, but as Nexus S got official ICS update from Google and has the same problem, we can use that report together.

And spread the news to other forums.

Google must fix this.
[Nexus S General] semprom:
Battery level: 50%

Android OS: 35%
[Nexus S General] irobert84:
I've got a problem with com.google.android.exchange module (I don't use push). It has a huge battery usage and the phone is hot. Does anybody met this issue?
[Nexus S General] praveenmarkandu:
Is there a way to do this without root or CWM?

Battery 4% (After 12h 8m)

Android OS 28%
[Nexus S General] roshga:
my android os level was as high as you all have, till i found out that it has a lot to do with wifi..

the wifi awake policy is set to 'always' by default. changed it to GB default 'only when plugged in' made the difference.

6 hrs since charge (a lot of navigating)

38% battery level

12% android os

screen on time: 1:10hrs

awake time: 1:20hrs

wifi on for the whole time, sometimes connected sometimes not (home / out)
[Nexus S General] saranyan:
Switching data on or wifi on keeps Andorid OS awake, My phone has been off battery for one and half hours, Out of which data was switched off for 45 mins.

Android OS has been awake for 42 mins. So leaving data or wifi on causes the android OS battery drain.

Any idea on how to fix it.
[Nexus S General] teuntje3:
Battery: 47%

Android: 33%

Screen 30%..

It isn't better since update to ICS. Battery of GB was a bit better.
[Nexus S General] mkoch820:
Battery: 66%

Android OS: 25%
[Nexus S General] skatastamoutrasas:
Everything is on but! with 2.3.6 I had a totall of 16 - 18 hours of stanby with average use. Now, I'm down to 10 hours tops!

Battery: 93%

Android OS: 40%!
[Nexus S General] praveenmarkandu:
Sorry. Would someone take the time to explain what exactly the Android OS service does?
[Nexus S General] ThomasDK:
Battery 73%

Android OS 25% (kept active for 1h 23min. out of 10h)
[Nexus S General] p.pavljasevic:
Battery 63%

Android OS 25%
[Nexus S General] Nexus MC:
Android OS: 41%

At one point this morning it was up to 71%
[Nexus S General] tomasi02:
OS android 30%

Screen 29 %
[Nexus S General] teuntje3:
How you get android os like 25%?
[Nexus S General] skatastamoutrasas:
OK, read this:

One restart, battery percentage showed to 18% - got a notification to connect the charger. Immidiatly, second restart, battery percentage showed back to 66%.

In both restarts I tryied to access the Recovery menu first but I faced an issue with a fallen Android with a red triangle coming out of his stomack - not important to this thread but this might affected the battery story.
[Nexus S General] civicdrivr:
Your battery is not yet calibrated for the rom. Either wait it out and it will calibrate on its own, or charge until it shows "Charged" on the lock screen, get into recovery, wipe battery stats, then let the battery drain until the phone turns off on its own. Then charge back to full.

Re: Recovery

In Root Explorer, go to System->Etc (make sure the folder is mounted R/W), and rename or delete install-recovery.sh

I renamed mine to install-recovery.sh.old. I didnt feel comfortable deleting it just in case I need to get back into it (slim chance).

---------- Post added at 03:27 PM ---------- Previous post was at 03:25 PM ----------

Almost a day later, on the same charge, and the Android OS service actually dropped:

Battery: 25%

Android OS: 17%

I use CPUSpy, and my phone is in a Deep Sleep state 71% of the time. For those of you with battery issues, theres got to be something keeping it awake.

I only have Music, GMail and Contacts syncing.
[Nexus S General] skatastamoutrasas:
Right now I cannot do the above since I have a problem accessing the recovery menu. The phone is still unlocked but I thing it needs to be re-rooted. Anyway, I will go over this at a later time since now it is kinda difficult.
[Nexus S General] gogol:
Guys, please don't forget to star this issue in the Google bug tracking :

http://code.google.com/p/android/is...s Owner Summary Stars&groupby=&sort=&id=22878

We need more stars...
[Nexus S General] antoniouslj:
Battery 50%

Android System 18%
[Nexus S General] poid:
OK tried to posts screens last night but XDA was obviously overloaded. Here are the screens taken yesterday when i posted, as well as the current status. I havent charged the phone or used wifi in between, i have used BT audio, made a few calls, checked email etc.

One thing i do remember is that i unchecked the options to use Google's location services when i set up the ROM. That could make a difference. I keep GPS on constantly though.
[Nexus S General] gogol:
@poid,

Thanks, I have all those location services off, GPS also off.

Looking at your screenshots, it's very interesting.

... Hmm... What is the clue?...

Low screen usage should not be the cause, because I saw one with low screen usage but still has high Android OS Keep awake time.

Are you constantly on WiFi?

If yes, what's your WiFi sleep policy?

Do you enable mobile data?

How is your signal strength?

Do you enable anything in the developers options?

Do you sync anything periodically?

Are you using 3G?

What kind of widgets do you have in the home screen?
[Nexus S General] teuntje3:
How you your screen that low? Here it is 30%..
[Nexus S General] gogol:
@poid,

Could you please make a screenshot of the Settings -> Apps -> Running

?
[Nexus S General] poid:
Agreed, screen usage shouldnt have anything to do with android OS and doesnt seem to be a factor

Nope, WiFi has been off this entire charge

Irrelevant for me, but i have it as always on. if everyone else has WiFi constantly on this could be a factor

Yes, mobile data is constantly enabled. As is roaming, but i dont seem to have roamed

Its usually pretty good. Right now its -81 dBm 16ASU. I always lose signal morning and afternoon for about 10 minutes as i pass through tunnels.

Developer options are unchanged from install. At the moment only USB debugging is checked.

Gmail, Google Calendar, Google+ at the moment. Sync is always on, i dont schedule it. Will enable Yahoo mail next charge to compare how it changes usage, and then Facebook on the charge after that. That way i can incrementally monitor their impact on battery life.

Yes i am

At the moment the only non-Google widget is a 4x1 Widgetsoid switcher. I removed the standard power control widget. I have the standard analogue clock, and the Market widget. Again i'll add widgets incrementally so i can monitor how they affect the battery.

yep, i've attached it.
[Nexus S General] poid:
because i havent had the screen on much. Only for checked a few emails and texts, taking screenshots and uploading them. otherwise my usage has been largely BT audio.
[Nexus S General] Max2mus:
Battery Percentage - 54%

Android OS - 27%
[Nexus S General] nauvho:
Battery Percentage - 63%

Android OS - 34%