iOS 12 is eating my battery!!!

Discussion in 'iOS 12' started by TinaBelcher, Sep 18, 2018.

  1. TinaBelcher macrumors 6502a

    Jul 23, 2017
    It’s evening now and its already 20% and I’ve barely used it today other than texting. I’ve also been at work, I shouldn’t be down to more than 49%.
  2. bbrks macrumors 65816


    Dec 17, 2013
    Wait for another couple of days and charges. Next week the situation could significantly improve...
  3. famoussasjohn macrumors 6502a


    Jul 7, 2010
    Overall I feel my battery life is about the same, if not better. Have you checked your battery usage and see what's eating it up? It gives a better indicator on what's using your battery and when.
  4. TinaBelcher thread starter macrumors 6502a

    Jul 23, 2017
    Messenger 20% and the rest is from 6-2%
  5. Freakonomics101 macrumors 68000


    Nov 6, 2014
    Beta 12/GM/Public Release has been great for me with daily battery life on my iPhone 10, iPhone SE and iPad Pro Wi-Fi + Cellular 10.5.
  6. CaptMarvel macrumors 65816


    Sep 20, 2014
    North Carolina
    Nom nom nom.

    It’s just normal indexing and should subside in a day or two.

    If it doesn’t, then you panic.
  7. Baerok, Sep 18, 2018
    Last edited: Sep 18, 2018

    Baerok macrumors member


    Feb 3, 2014
    My iPhone 8 dropped overnight from 98 to 54 percent. Never before have I experienced such a huge battery drain. I'll give it one more more day or two and report my results.
  8. CreamEggBear macrumors regular


    Dec 29, 2016
  9. joeblow7777 macrumors 603

    Sep 7, 2010
    On my 6th gen iPad and iPhone 8 Plus battery life seems to be the same or perhaps slightly better than it was on 11.4. Certainly no worse.
    --- Post Merged, Sep 18, 2018 ---
    Something is wrong there. It should take days if not WEEKS of standby to drain that much!
  10. jbizzybeetle macrumors 6502a

    Mar 9, 2015
    overnight into morning use the iPX seems to have drained like a sieve.

    I then charged wirelessly for couple hours and rest of day reflects more typical reduction with use.
  11. CalmEnvy macrumors 6502a

    Feb 9, 2008
    Hmm I have an 8 Plus, currently 50% remaining and it’s been off the charger since 5:45am. Bluetooth is always on as I have an Apple Watch and use my AirPods on the bus/train to and from work. Gotta say I’m getting great battery life so far.
  12. Clix Pix macrumors demi-goddess

    Clix Pix

    Oct 9, 2005
    8 miles from the Apple Store at Tysons (VA)
    Battery life here on all my iOS devices seems to be normal. I downloaded and installed iOS 12 into them this afternoon and so far things are perfectly fine here.
  13. HeyKatie macrumors 6502

    Sep 7, 2012
    I got 3 hours out of my iPhone 7 today.
  14. intamin macrumors newbie

    Nov 20, 2012
    3 hours out of my 6s, too. Hoping it improves this next charge which I'm doing right now.
  15. Perene, Sep 18, 2018
    Last edited: Sep 18, 2018

    Perene macrumors 6502a


    Jun 29, 2015
    Do the following:

    - Reset the device to factory settings.

    - Don't restore from iCloud or a backup stored in your computer.

    - Update the device with iOS 12.

    - Download all apps from your Apple ID account and reconfigure everything. From scratch.

    If I am not mistaken I read multiple times this is the best way to do any update... and make sure these battery issues are from the iOS version, not the device.

    P.S. reasons why a clean install is better:
  16. C DM macrumors Sandy Bridge

    Oct 17, 2011
    3 hours based on what?
  17. intamin macrumors newbie

    Nov 20, 2012
    What do you mean based on what? 100% - 0% in 3 hours after upgrading. Normal usage, maybe a smidge extra GPS loads but never keeping it on, just to see the new apps.

    Usually get 4.5-5.
  18. C DM macrumors Sandy Bridge

    Oct 17, 2011
    So as in, for example, 100% at 8 AM and then 0% at 11 AM?
  19. intamin macrumors newbie

    Nov 20, 2012
    No, lol, 3 hours of screen time. It's what we're all talking about. :)
  20. C DM macrumors Sandy Bridge

    Oct 17, 2011
    Well, that's kind of why I was asking. But how are you telling that given that in iOS 12 it doesn't really tell you screen time or even standby time since last charge anymore?
  21. bleak7 macrumors member


    Sep 17, 2018
    If this is related to the 11.4 battery drain that people experienced back when it came out (myself included), then what you can do is try to re-install the phone directly into iOS 12 with DFU mode. It fixed my issue when everything else wouldn't.
  22. pkts macrumors member

    Jun 29, 2007
    Also experiencing worse battery life since updating from 10 to 12 on my SE. My 6 has had no such issues. All the more odd since my SE was the one with amazing battery life. Weirdest part is that the battery percentage drops in batches. It'll be a 50% and then drop to 48 or 47% while I'm looking at it (not doing anything major, not using GPS or watching a video). I've been through plenty of updates and never seen this before.

    When I did the update, I was charging but the battery percentage still dropped 10% and the SE was REALLY hot after. Battery health at 90%
  23. HeyKatie macrumors 6502

    Sep 7, 2012
    Screen time. I an hour of which was music. :/
  24. iOZZY macrumors member


    Mar 17, 2013
    Stamford, England
    My SE is doing the same. 100% battery health.
  25. Sid91 macrumors newbie

    Sep 19, 2018
    Same thing has been happening with me, iPhone 7's battery went down from 60 to 0% overnight and drops 1% per 30 seconds while using it, this **** completely ate my battery life. Battery health at 86% BTW....

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