iOS 8.1.2 Battery Life

Discussion in 'iOS 8' started by doublex14, Dec 10, 2014.

  1. doublex14 macrumors regular

    doublex14

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    #1
    After updating yesterday afternoon my battery on my iPhone 6 was as normal if not better; but then today it randomly dropped 22% without me even using it. It's now draining at a faster pace and I'm worried if I should go back to 8.1.1 or if that will even fix this. I'm going to drain it, turn it off, then charge to 100%. How is your guys' battery?
     
  2. Armen macrumors 604

    Armen

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    #2
    it takes a few charge cycles after an update for the battery to settle.
     
  3. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #3
    Might have some app or service that went into a weird state, as occasionally can happen. Have you tried restarting just in case to terminate some stuck process or something else along those lines?
     
  4. chillenandy321 macrumors regular

    chillenandy321

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    Orlando, Florida
    #4
    Same here 6+ with 8.1.2 doing a full charge now after it died today. Hopefully it will get better.
     
  5. Donoban macrumors 6502a

    Donoban

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    #5
    You don't srs believe this do you?
     
  6. doublex14 thread starter macrumors regular

    doublex14

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    #6
    Yes and it somewhat improved. I'll drain it and charge to full though
     
  7. Bahroo macrumors 68000

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    Jul 21, 2012
    #7
    I usually do a hard reset after every update to clear any potential stuck processes and clear any little quirks/bugs that mighy of came up in updating, has been working great for me, been doing this for a while now too and updates have been very good for me
     
  8. Armen macrumors 604

    Armen

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    #8
    I'm more surprised you don't know this?
     
  9. steve23094 macrumors 68000

    steve23094

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    Apr 23, 2013
    #9
    I have never heard this before. What sources are you using?
     
  10. Armen macrumors 604

    Armen

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    #10
    Here you go:

    http://www.appledystopia.com/how-to/calibrate-iphone-battery/

    "Battery calibration accomplishes two things: it conditions the battery and helps the software calculate the range of battery life. One should calibrate the battery once a month and after every major iOS upgrade. If you upgrade iOS and notice diminished battery life, try calibrating the battery before anything else."

    http://www.zdnet.com/article/poor-battery-life-after-installing-ios-7-1-try-these-simple-tips/

    "When updates are installed onto iOS device it seems that the battery calibration data is wiped, and this is partly to blame for the rash of battery complaints following update."
     
  11. drchimrichalds macrumors newbie

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    Sep 17, 2014
    #11
    i'll give that a try. battery life have been horrible... T-T
     
  12. Donoban macrumors 6502a

    Donoban

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    Sep 7, 2013
    #12

    I've read the attached links. There may be an issue with the battery level reporting for some users but I don't think its a systemic issue with iphone that requires a recalibration once a month.

    I still suspect many of these articles are only written to generAte web traffic.

    Thanks for the links
     
  13. iososx macrumors 6502a

    iososx

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    #13
    The statement above is a popular myth that's false.

    Apple.com has all the Tech Support Information needed.

    Here's one pertinent link:

    http://www.apple.com/batteries/maximizing-performance/



    My iP6+ battery life is up between 8% to 12% increase in run time.
     
  14. Armen, Dec 10, 2014
    Last edited: Dec 11, 2014

    Armen macrumors 604

    Armen

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    #14
    Where exactly did you see anything in that entire article about how a battery acts after an iOS update? There is nothing stated there to support your claim.

    Were you expecting a "by the way, sometimes when you update your iOS your battery may take a few days to stabilize" entry admitting that Apple has an issue? No company does that.
     
  15. C DM macrumors Westmere

    Joined:
    Oct 17, 2011
    #15
    Apple moved away from specifying anything specific about it as they did before, but the general idea behind it isn't really a myth, it's just it's generally not something that would need to come up as often as some believed or might still believe: http://batteryuniversity.com/learn/article/battery_calibration
     
  16. sunking101 macrumors 603

    sunking101

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    Sep 19, 2013
    #16
    Pretty sure my 6+ battery is draining quicker since the latest update. Need another cycle to make sure.
     
  17. Sal09 macrumors regular

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    Sep 21, 2014
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    England, UK
    #17
    Battery life on my 6+ has gone up a notch since the update. It was tremendously good before but now its even better. Yes my usage is low for today but still the battery is holding up pretty good :)
     

    Attached Files:

  18. sunking101 macrumors 603

    sunking101

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    Sep 19, 2013
    #18
    Clean install or OTA? MY 6+ is draining faster after an OTA update. My previous two updates have been done OTA with no battery life impact.

    ----------

    Those stats are nothing special for the 6+ compared to what I was getting with 8.1.1
    Of course usage varies from person to person.
     
  19. iososx macrumors 6502a

    iososx

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    Aug 23, 2014
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    USA
    #19
    No matter if it's my newest iPhone, iPad or MacBook Pro, I always choose to wipe it completely, perform a clean install and start fresh.

    I backup my devices daily, and also maintain complete images. Although obviously it's laborious to start fresh, I'll purposely wait until I have time to do so since I have lots of patience and always have ideas regarding modifying my setups.

    That's one of the reasons I love my Nexus 6 Android, that's an OS that offers endless possibilities. Each time I try something new it results in better productivity.

    I'm five hours into a very busy day on my iPhone 6+ and thus far I'm positively thrilled and very impressed with both battery life and a bug free version of iOS 8.1.2. (12B440). :D
     
  20. thedru13 macrumors regular

    Joined:
    Sep 12, 2014
    #20
    After the update my battery life is horriable in my ip6+ i usually am fine with no charge the entire day streaming pandora on and off and google hangouts, email and text messaging.

    today after leaving my phone on my desk streaming pandora for about an hour I was down to 8%. I was shocked. Never has this happened. My phone was burning hot as well.

    So something happend after that update.
     
  21. sunking101 macrumors 603

    sunking101

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    Sep 19, 2013
    #21
    Definitely worse for me. I'm heading for approx a 2 hour reduction in runtime this charge cycle.
     
  22. thedru13 macrumors regular

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    Sep 12, 2014
    #22

    Mine is much worse than that. Also the phone feel like it's going to burst into flames.
     
  23. sunking101 macrumors 603

    sunking101

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    Sep 19, 2013
    #23
    Sounds like you definitely need to do a fresh install via iTunes.
    I'm loathe to do likewise because I wasted hours with iOS7 doing fresh installs to cure battery drain and had zero positive results.
    It bugs me when some people report improved battery life! Mine was superb on iOS8.1.1 but now it's mediocre.
     
  24. thegrants82 macrumors 65816

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    #24
    Interesting to read that people still believe this......
     
  25. thedru13 macrumors regular

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    Sep 12, 2014
    #25
    Ok so when you say fresh install meaning do a set up as new phone then not restore from backup? I did that the last time I had an issue around this where I just started brand new only synced my contacts that was it. The thought of starting from scratch again makes me very cranky.

     

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