01-28-2016 12:24 PM
35 12
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  1. Devendra95's Avatar
    Hello, I have a T-Mobile Samsung Galaxy s5 and its running Android 5.1.1. Ever since the update, I've noticed that Android OS has been using battery the most. Worst of all, if I leave the phone on sleep for a few hours, the battery starts to drain. I have sync turned off, Bluetooth off, WiFi off, I don't have apps that pull background data and I disabled all of the ones I don't use. The only apps I use throughout the day are textra (for texting), Flipboard, and I make a few calls. In the attached image, it shows the stay awake time for Android OS which is exactly the same amount of hours from which I didn't wake up the phone. Also a few nights ago, I went to bed with 63% battery and woke up with 49%. At the top of the battery usage chart was Android OS, followed by Android system, then screen. I never had this problem prior to 5.1.

    Thanks in advance.


    How can I fix my Android OS battery drain after 5.1.1 update?-13401.jpg
    07-03-2015 08:29 AM
  2. B. Diddy's Avatar
    Welcome to Android Central! Sorry, but we can't see any images. http://forums.androidcentral.com/amb...d-central.html

    Does this persist after a reboot? Did you wipe the cache partition? http://support.t-mobile.com/docs/DOC-10404
    07-03-2015 01:19 PM
  3. Devendra95's Avatar
    Hi, i uploaded the image. And yes, this problem goes away after a reboot but it starts again after a few hours.
    07-03-2015 01:29 PM
  4. B. Diddy's Avatar
    Show us a few more battery stats, but wait until you've used most of the battery charge. Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

    1. The main Settings>Battery screen.
    2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
    3. The Screen category (to see total Screen On time).
    4. The Cell Standby category, if present (to see Time Without Signal).
    07-03-2015 02:11 PM
  5. Devendra95's Avatar
    Sure i will do that this evening. Android OS already started the battery drain before i got to work this morning :/
    07-06-2015 08:10 AM
  6. Devendra95's Avatar
    here are the screenshots
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-06-19-43-30.jpg
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-06-19-43-37.jpg
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-06-19-43-48.jpg
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-06-19-44-04.jpg
    07-06-2015 06:58 PM
  7. B. Diddy's Avatar
    I see what you mean--something is keeping the phone awake constantly. You said that it returns soon after a reboot, but did you also try a cache partition wipe as previously suggested?
    Devendra95 likes this.
    07-06-2015 10:21 PM
  8. Devendra95's Avatar
    Yes, as soon as I noticed this problem since the update, I wiped the cache partition. Last night I had to reboot twice for it to calm down.
    07-07-2015 05:28 AM
  9. B. Diddy's Avatar
    Ok, how about Safe Mode, to see if the problem is being caused by a 3rd party app: https://support.t-mobile.com/docs/DOC-10696

    If it persists in Safe Mode, you could try reflashing the firmware using Kies or Smart Switch. Another option would be to use Odin: http://forums.androidcentral.com/amb...interface.html
    Devendra95 likes this.
    07-07-2015 11:00 AM
  10. Devendra95's Avatar
    i tried safe mode and i took these screenshots of the applications that are running.

    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-07-14-47-50.jpg
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-07-14-47-54.jpg
    How can I fix my Android OS battery drain after 5.1.1 update?-screenshot_2015-07-07-14-48-03.jpg
    07-07-2015 04:37 PM
  11. B. Diddy's Avatar
    Actually, what would interest me is if the phone remains awake constantly, even in Safe Mode (as shown in the bars under the main battery graph).
    Devendra95 likes this.
    07-07-2015 05:03 PM
  12. Devendra95's Avatar
    okay i will leave safe mode on for the rest of the evening. In the meantime, does flashing the firmware erase all data? If so, is there a way to flash the firmware while keeping the data on my phone?
    07-07-2015 05:32 PM
  13. B. Diddy's Avatar
    I think it does, but I'm not sure. Let me ask around.

    One of my Ambassador colleagues, itguyjax8430, says that if you're flashing the exact same firmware, it won't wipe--but if you flash a different firmware, it will wipe. To be safe, you should probably back everything up anyway.
    Devendra95 likes this.
    07-07-2015 06:57 PM
  14. itguyjax8430's Avatar
    If wiping the cash partition did not work then I would say a factory reset is needed. The update to Lollipop has been causing a lot of issues with a lot of devices and most of those issues are resolved after a factory reset. It sounds like the phone is not going into deep sleep. Give this app below try to see if your phone is actually going into deep sleep. If it is not then I would definitely recommend a factory reset. It's called CPU Spy and it monitors your processor wake times.

    https://play.google.com/store/apps/d...k.cpuspy&hl=en
    B. Diddy and Devendra95 like this.
    07-07-2015 07:13 PM
  15. Devendra95's Avatar
    Alright so if I upgrade the firmware using Kies, it won't erase anything? And I'm running in safe mode today to see if the problem persists
    07-08-2015 06:46 AM
  16. Devendra95's Avatar
    Thank you, I will give this a try
    07-08-2015 06:46 AM
  17. dakshay95's Avatar
    Thank you, I will give this a try
    If I had to guess, I would say that it's because of your mobile network. Do you face the same battery drain at home as well as at work/office? Try switching to 2G or 3G in areas where 4G coverage isn't that great or your phone will stay awake struggling to hold on to the network signal...

    EDIT: If you're facing the battery drain at home while sleeping, try doing this for a night: Charge your phone up to 100%, unplug from charger, turn off your mobile network or disable your sim but keep the WiFi turned ON. Now do not disturb the phone and go to sleep. See how much charge you have the next morning...
    07-08-2015 08:33 AM
  18. Devendra95's Avatar
    I've tried that already. I leave WiFi on when im at work because it uses less power than 4g. I also leave wifi on overnight too. i think this a bug in the update.
    07-08-2015 08:50 AM
  19. dakshay95's Avatar
    I've tried that already. I leave WiFi on when im at work because it uses less power than 4g. I also leave wifi on overnight too. i think this a bug in the update.
    Yes, leave WiFi on but DISABLE your SIM at night and see how that changes things...

    Sent from my Moto G 2014 using Tapatalk
    07-08-2015 08:52 AM
  20. Devendra95's Avatar
    How do i disable the sim?
    07-08-2015 09:02 AM
  21. dakshay95's Avatar
    How do i disable the sim?
    I don't know about the S5 but on my Moto G2, I go to settings -> SIM Cards and disable it from there...

    Sent from my Moto G 2014 using Tapatalk
    07-08-2015 09:05 AM
  22. B. Diddy's Avatar
    Instead of disabling the SIM, you could turn on Airplane Mode, which turns off the cell radio. When Airplane Mode is on, you can still turn on wi-fi.
    07-08-2015 11:21 AM
  23. Devendra95's Avatar
    I've decided on flashing the stock firmware using Smart Switch. I will update you if the problem continues after the recovery. Thanks
    B. Diddy likes this.
    07-08-2015 11:48 AM
  24. Devendra95's Avatar
    UPDATE: i reinstalled the firmware using smart switch and everything seems normal for now. I will report back if the same issue occurs again.
    dakshay95 and B. Diddy like this.
    07-09-2015 08:02 AM
  25. Icey2010's Avatar
    Hi devendra- did the firmware reinstall finally solve the issue completely? I'm facing the exact same issue as yours
    07-11-2015 10:26 PM
35 12

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