iPhone 6 plus battery drain under ios 9

Discussion in 'iOS 9' started by king-spirit, Sep 24, 2015.

  1. king-spirit macrumors newbie

    Sep 10, 2014
    Hello guys,
    since updating to ios 9 last week i got heavy battery drain on my iPhone 6 Plus.
    I normally have everything turned off, so that I get the most out of my battery.

    Under ios 8.4 I had at least 9-10 hours battery life, with moderate usage about 12-13 hours.
    Since updating to ios 9.0 (and 9.0.1) my battery lasts about 7 hours (usage time).

    I did everything I could (reset all settings, clean install via itunes). still no change.
    I want my battery life back, and I dont want to use LowPower Mode all day long.

    What should I do? Downgrade to ios 8.4? (I really like Ios 9).
  2. Aniseedvan macrumors 65816

    May 14, 2012
    I'm getting the same on both my ipad air 2 and iphone 6 on 9.0.1. Both in the 20's percent after being off charge 11 ish hours
  3. xreyuk macrumors member

    Jul 22, 2010
    I'm the same on an iPhone 6.

    I would have 8.5 - 9 hours usage, now I'm lucky if I get 6 hours. I've tried everything, turning on and off all kinds of settings (even though I shouldn't have to, I'm on exactly the same settings as iOS 8). I've tried numerous completely fresh installs, manual resyncs, and nothing is helping.

    I'm wondering if there are any apps we may have in common causing this?
  4. lympero macrumors 6502a


    Sep 1, 2008
    Arta, Greece
    Same problem with 6 plus. I had fantastic battery life (11 hours) and now I'm down to 7 hours or 8. That's ridiculous
  5. king-spirit thread starter macrumors newbie

    Sep 10, 2014
    this cant be real. what is the actual problem causing these ridicolous battery lifes :/
  6. rocksyoursock macrumors regular


    Mar 12, 2011
    Facebook was causing it for me. I had 20 minutes screen usage, 5.5 hours background usage despite background app refresh being disabled. Reinstall of iOS and FB did not solve. Affects my iPhone 6 and Air 2.
  7. king-spirit thread starter macrumors newbie

    Sep 10, 2014
    i actually kill the facebook app everytime after i used it. still same problem. I'll try to delete it for a while. Hope battery life gets better
  8. Aniseedvan macrumors 65816

    May 14, 2012
    You don't think the Fb outage today had anything to do with it, I.e. Polling a non existent service?
  9. azhava macrumors regular

    Aug 29, 2010
    Arizona, USA
    The battery drain issue seems to come up with every new iOS version release (see below for a few examples). A couple weeks later people are proclaiming it the best release ever, with awesome battery life. It's most likely a combination of the phone doing "housekeeping" (updating software/apps, etc.), along with the user spending more time playing with new features, tweaking settings, etc.

    iOS 7.1 drained batteries - http://forums.macrumors.com/threads/ios-7-1-battery-drain.1726249/

    iOS 8.0.2 drained batteries - http://forums.macrumors.com/threads/ios-8-0-2-on-iphone-5s-battery-drain.1801370/

    iOS 8.1 drained batteries - http://forums.macrumors.com/threads/battery-draining-faster-after-8-1-update.1805714/

    iOS 8.3 drained batteries - http://forums.macrumors.com/threads/severe-battery-drain-8-3.1864157/

    iOS 8.4.1 drained batteries - http://forums.macrumors.com/threads/ios-8-4-1-battery-drain.1910652/

    WatchOS 2.0 drained batteries - http://forums.macrumors.com/threads/massive-watchos-2-battery-drain.1919364/page-5#post-21940611
  10. xreyuk macrumors member

    Jul 22, 2010
    I am monitoring mine from the usage tab in iOS. There has been no change to my usage as I haven't had time to play with any new features.

    It's not like I'm saying 'I'm on X % battery by 4PM, when I'm usually on X because I understand actual usage plays a part, depending what you're doing etc.

    I have lost between 2.5 to 3 hours worth of actual usage from my battery life. This happened immediately after upgrade, and I was told to wait as the software did indexing etc. I have not improved since. It is stuck at being poor, and I have lost around 33% battery life.
  11. rocat1997 macrumors regular

    Dec 18, 2012
    Fort Worth
    Y'all must have something wrong. My iPhone 6 Plus has great battery life on iOS 9. I did clean install it. The first day was bad but by the 3rd day it was rocking.
  12. xreyuk macrumors member

    Jul 22, 2010
    Yeah this is what I don't understand. I've tried three fresh installs.

    Coconut battery shows the battery as 98.5% healthy and I was running 8.4.1 no problem.
  13. roanmy macrumors member

    Nov 10, 2011
    The battery on my 4S is also draining abnormally fast. I should specify that it's standby battery that's the issue. It does drain rather fast while I'm using it, which is annoying but not an outright problem. What is a real problem, however, is the fact that it drains very fast in standby as well. It's can't be the battery itself as it was recently replaced, and overnight drain on it wasn't high before. As a result I chose to go back to 8.4.1. Hopefully it'll improve soon so I can upgrade as I want that SF font goodness. :D
  14. T5BRICK macrumors G3


    Aug 3, 2006
    No issues on my 6+ here. Battery life might actually be better, but I haven't confirmed yet. I did an upgrade using iTunes when the GM was released, then an OTA update when the public release was available.
  15. mikemj23 macrumors 6502

    Jul 27, 2010
    I have to admit my battery life on my 6+ seems to be very strong on iOS 9. I'm at 10hr 10min of usage and 18hr 5min of Standby and still have 44% left.
  16. Applenoob34 macrumors 6502

    Feb 18, 2014
    Battery life on mine is the same. I don't have Facebook though.
  17. Salvor Hardin macrumors regular

    Jun 24, 2013
    Anyone noticing if the iOS video player is draining battery faster than it was with iOS 8? Like playing a 720p video in Safari or a 3rd party Youtube app like Youplayer seems to be using more battery and getting my device warmer than Netflix playing a 1080p video which uses a custom video player. 3 hours of playing a 720p Youtube video with brightness at around 45% had my 6+ down to 50%, I have no idea what the results would have been under 8.

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