05-08-2012 08:13 AM
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  1. UK_Alum_02's Avatar
    My battery life has gone to hell as well since the update. I took it off charge at 9 this morning and it died (dead) at 12:30 tonight. I have made probably 30 minutes worth of calls, checked facebook once or twice and sent a handful of texts. Nothing outrageous. I checked my usage and I am at 86% Android OS and the next highest is 4%. Not sure what to do about this.
    12-29-2011 11:59 PM
  2. werds's Avatar
    @Birvini With what kind of usage and how aggressive are your settings?

    Sent from my Samsung Galaxy S II using Tapatalk
    12-30-2011 12:04 AM
  3. UK_Alum_02's Avatar
    I will have to plug it in to turn it back on but I don't think I have anything crazy setup. Not pushing email (besides Gmail) or anything like that.

    Android OS 84%
    Display 6%
    Standby 5%
    Android system 3%
    Voice Calls 2%

    Brightness is set at half.
    12-30-2011 12:10 AM
  4. Davidjacobs21's Avatar
    I also talked to ATT and they are sending me a new battery but i doubt it will help. My android os is now up to 92% and i have no apps running! This is getting ridiculous
    12-30-2011 07:49 AM
  5. UK_Alum_02's Avatar
    My chat with ATT just now ended with them just passing me off to Samsung. They said that Samsung handles all issues with software updates.
    12-30-2011 08:13 AM
  6. birvini's Avatar
    My settings have always been very low. I only use one home screen with a weather and battery widget. I have push notifications set for two gmail accounts and ebay. I keep my screen turned down to 20% and I have all of the power saving options turned off.

    I probably made 20 minutes of phone calls yesterday and spent 20-30 minutes on the internet. I have noticed with the new battery that the Android OS usage is back where it used to be at 8-10% after a days use. The display and phone dialer were my big users yesterday.

    I do turn off and charge my phone each night which I think helps.
    werds likes this.
    12-30-2011 08:32 AM
  7. enjoylife949's Avatar
    I have been home for the holiday period so I have had my Wifi turned on this whole time. Yesterday I turned off the WiFi and now have a totally different battery use to report. With WiFi off and very little use of the phone my battery is now at 80% after 24 hours with Android 2.3.6
    12-30-2011 09:01 AM
  8. ricktat's Avatar
    Pull the battery and SD card card and reinsert.

    Off charge for 3 hours and only 3% used. That would have been at 30% yesterday. Display is finally ahead of Android OS again in use.
    12-30-2011 11:13 AM
  9. j-bo's Avatar
    Pull the battery and SD card card and reinsert.

    Off charge for 3 hours and only 3% used. That would have been at 30% yesterday. Display is finally ahead of Android OS again in use.
    Hmm.. ditto this for me... so far. Android OS back down to 9% where it was running from 57-87% prior.

    Strange.. but will monitor this more.
    12-30-2011 01:46 PM
  10. ricktat's Avatar
    over 6 hours and still at 90%.
    12-30-2011 02:44 PM
  11. werds's Avatar
    Ugh, I need to learn to avoid updating before seeing who has had what issues. I just bought this phone off contract a couple days ago so had no point of reference other than comparison to my iphone 4 that I just moved away from.

    I have all of the various power saving settings turned on, I have been on wifi the past two days at home, I haven't had the screen any brighter than 20% and usually at 10% because I am indoors in low lighting for the most part, I have tried the pulling the battery and SD card, gone through at least 5 power cycles and each time after 5to 6 hours on battery it claims Android OS is eating up 75-80% of the battery charge... the only time it shows display as eating up the most is within the first hour of being off charge where it shows display as 60% and Android OS as 3%

    I am off work until the new years so hoping to nail down a usage pattern that won't kill my phone before the end of a full workday but this is ridiculous,even when I leave it asleep it chews through battery. Hopefully there is some other update coming soon enough that fixes this... or maybe when I purchase some spare backup batteries the problem might correct itself - this just doesn't seem to make sense to me though
    12-30-2011 06:18 PM
  12. MattMJB0188's Avatar
    I thought I'd share my experience with 2.3.6. Today at 8am I pulled my phone off the charger. By 1 I was at 92% with zero use. I barely touched my phone today at work and right now at 6:30 I'm at 70% for the Android OS and 10% for the display. I pulled my battery this morning before I powered on. I'm not really willing to load a custom rom or anything so I guess I'll just deal with it. Hopefully it will go down in a week once its had time to settle.
    12-30-2011 06:32 PM
  13. j-bo's Avatar
    At 9hrs on battery..still at 68% ..wifi on all this time..drove hour and half with poweramp playing through car....and android os hasnt gone over 16%.

    Hard to believe that trick is working so far. Will monitor for the next few days.

    sent from my galaxy S2
    12-30-2011 07:27 PM
  14. Baroka's Avatar
    At 9hrs on battery..still at 68% ..wifi on all this time..drove hour and half with poweramp playing through car....and android os hasnt gone over 16%.

    Hard to believe that trick is working so far. Will monitor for the next few days.

    sent from my galaxy S2
    can we swap phones??
    12-30-2011 07:47 PM
  15. MattMJB0188's Avatar
    At 9hrs on battery..still at 68% ..wifi on all this time..drove hour and half with poweramp playing through car....and android os hasnt gone over 16%.

    Hard to believe that trick is working so far. Will monitor for the next few days.

    sent from my galaxy S2
    Whats the trick?
    12-30-2011 09:04 PM
  16. werds's Avatar
    Well... sorta solved my problem but introduced new ones lol, I downgraded to 2.3.4 and that worked for battery but caused my phone to be unable to connect to wifi... after futzing around and not finding a good and easy solution I moved over to 2.3.5 and that worked (forgot to root and backup so having to redownload and redo settings sucks) but now the battery usage looks correct with display atfter just one hour of usage at 54% and the next closest being Android System at 19% with Android OS (the previous culprit for battery drain) nowway down the list at 4%.

    The downside to this solution other than redoing all settings and redownloading apps? The photo gallery app freezes anytime I open it... thankfully I just downloaded a QuickPic app and can use that for photo browsing I guess,and for some reason double tapping or long pressing the home button isn't bringing up my task manager shortcut either... hopefully I don't run into any other issues. If the battery drain comes back I will update but this is definitely pointing to it being an issue with the 2.3.6 update itself

    Now I just need to root this damn thing so I can run me some backup apps... doing this once is enough for me to never want to do it a second time
    12-31-2011 12:42 AM
  17. kevinqian's Avatar
    Have had the update for about 2 weeks now and definitely not seeing the night and day difference in battery drain that you guys are seeing. Idle drain seems normal, overnight 8hrs, battery down 7%. Although any activity or usage drains the battery quite fast, but I think this is normal as before. I hope they release an update soon to fix your battery issues.
    12-31-2011 01:03 AM
  18. runtohell121's Avatar
    Over the past 3 hours.. I lost 15% battery.. 5% per hour... still don't know what's causing it.
    12-31-2011 01:20 AM
  19. Trickology's Avatar
    I can't seem to figure my battery out some days its amazing other days its horrible. The days its really bad I noticed my Android OS.over 90% and days its good like right now I'm at 15%.
    12-31-2011 08:21 AM
  20. SM05's Avatar
    Have had the update for about 2 weeks now and definitely not seeing the night and day difference in battery drain that you guys are seeing. Idle drain seems normal, overnight 8hrs, battery down 7%.
    It used to drain about 1-2% overnight for me before the update. It would last roughly day and a half for me between charges. After installing 2.3.6 I started charging it every night. It was also draining at the rate of 7-10% overnight. So, I can't say it was terrible after the update but battery life had definitely took a hit.

    So, I used unroot instructions last night (my phone is not rooted) and restored it to 2.3.4 w/o losing any settings or data in about 10 mins time. Was real easy and straight forward. Overnight battery drain is back to 1-2% so far.

    Something is definitely screwed up with 2.3.6.
    12-31-2011 10:24 AM
  21. Wookiee's Avatar
    EDIT: The results did not ultimately stick and the battery drain eventually started again. We've since reverted back to UCKH7 / 2.3.4. See Entropy512's post below for details.

    I found something that worked for myself and my partner. We each own this phone and we're both running 2.3.6. Android OS was causing major battery drain.

    After reading through this thread, I tried removing the battery in both phones. Amazingly, it worked for mine, but not my partner's phone. We tried everything - killing apps and widgets, restoring, etc. - but nothing seemed to stop the Android OS battery consumption on his device.

    Then, I had a thought. I tried swapping batteries - mine in his phone, his in mine. Sure enough, it fixed the problem. I even swapped the batteries back to their original devices and it's still working.

    Android OS went from ~50-70% drain to ~10-11%.
    12-31-2011 12:37 PM
  22. BugDad25's Avatar
    removing and reinstalling battery did wonders for me also. Definitely give it a try

    Sent from my SAMSUNG-SGH-I777 using Tapatalk
    12-31-2011 01:11 PM
  23. Strawdawg's Avatar
    Mine is showing higher OS use, but, the battery consumption appears about the same
    12-31-2011 04:12 PM
  24. Entropy's Avatar
    removing and reinstalling battery did wonders for me also. Definitely give it a try

    Sent from my SAMSUNG-SGH-I777 using Tapatalk
    Temporary fix - the drain will come back.

    Replacement batteries will NOT fix the problem. It's a problem with the wifi firmware or something else in /system.

    The wifi chipset is made by Broadcom and has a special feature called "Bluetooth Alternate MAC and PHY" (BT-AMP) - it apparently allows tunneling of Bluetooth over WiFi. In I777 UCKK6 and also recent Infuse Gingerbread leaks (UCKJ2 and later at a minimum), this feature randomly goes bonkers and starts waking up the phone once a second. This kills battery.

    For more details:
    Horrible battery life after 2.3.6 - Page 4 - xda-developers

    And general info on drain hunting (including how to confirm the problem with a Wireshark capture if oyu are rooted):
    [REF] Known identified battery drainers - xda-developers

    Also, please stop referring to it as 2.3.6 and by its proper Samsung build number, UCKK6. This allows the exact build to be identified, especially since this problem has nothing to do with Android 2.3.6 in general.

    Right now the best fix is a revert to UCKH7. There is documentation over on XDA. I strongly recommend not going to galaxys2root.com - it's intended to be an advertising clickfarm and the guy that set it up hasn't touched an I777 in months.
    chaplain likes this.
    12-31-2011 05:36 PM
  25. MattMJB0188's Avatar
    Anyone who is not pleased with this update should consider flashing to Unnamed Rom which is just like STOCK but so much better.

    Just go with the 2.3.4 firmware though I'm sure his 2.3.6 firmware is very stable.

    [ROM][2.3.6] UnNamed v2.2.1 - (12/22/2011) - Improved battery life and performance - xda-developers
    12-31-2011 05:38 PM
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