Iphone 7 battery % indicator not accurate

Discussion in 'iOS 10' started by Galacticos, May 8, 2017.

  1. Galacticos, May 8, 2017
    Last edited: May 8, 2017

    Galacticos macrumors 6502a

    Galacticos

    Joined:
    Apr 5, 2016
    #1
    wasnt sure whether to put this here on under iphone.

    My iPhone battery percentage indicator is off. There is about ten percent worth of charge above 100%. ive attempted to correct this by calibrating the battery but it seems to revert shortly after.

    I was going to attempt a clean install of iOS without erasing my phone.. I think this is done through dfu mode or something? If anyone has clear instructions for how to do this I'd appreciate it!

    I'm wondering is there are any other suggestions/fixes out there?
     
  2. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #2
    What do you mean there is about 10% worth of charge above 100%?

    Are you referring to your battery being above health? If so that is completely normal and it is not reported by iOS. Its not possible for iOS to report a 110% capacity.
     
  3. bkends35 macrumors 6502a

    bkends35

    Joined:
    Feb 24, 2013
    Location:
    USA
    #3
    You mean it lasts on 100% for as long as it lasts from 90-80%? If so, that is normal. It's not actually the true percent.
     
  4. Galacticos thread starter macrumors 6502a

    Galacticos

    Joined:
    Apr 5, 2016
    #4
    Maybe that's it?
    When I charge fully my phone sits for a long time above 100%. Today it was 6 hours of standby time 15mins usage and didn't go below 100%.

    As I said I've recalibrated the battery a few times and that seems to reduce but it soon returns to the original pattern.
     
  5. Relentless Power macrumors P6

    Relentless Power

    Joined:
    Jul 12, 2016
    #5
    Also, Just as a side note, the iPhone battery tracker is a just a general measurement. It's not 100% accurate.
     
  6. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #6
    I will fully explain why it does that in about 30 minutes. On mobile right now. Need my computer.
    --- Post Merged, May 8, 2017 ---
    iOS reports the battery at 100% when it actually reaches 95%.

    100% = 95% actual
    50% = 47.5% actual
    5% = 4.75% actual
    1% = 1% actual

    This is why the battery always seems to be stuck on 100% longer than any other percent. This is because it is really going through 5% before the iOS meter moves. This is why it appears to stick to 100% for hours at a time, because its really draining from 100% -> 95% before it starts getting reported by iOS.

    So even though your battery health is above 100%, that doesn't change how iOS reports the battery percent or how the battery meter works. If your battery health is really 110%, that means each percentage point is worth .1% more than normal. But iOS will still report it as a max of 100%.
     
  7. Galacticos thread starter macrumors 6502a

    Galacticos

    Joined:
    Apr 5, 2016
    #7
    I knew the reporting wasn't accurate, I just didn't know how or why it is that inaccurate, so thanks!

    I haven't checked if my battery health is greater than 110% (by which I presume you mean my battery has more charge than the specs say), but it sounds like the reporting of actual percentage could explain the difference in itself.

    Another helpful post! Thanks
     
  8. Daniel80 macrumors member

    Daniel80

    Joined:
    Jun 5, 2016
    Location:
    Romania
    #8
    Let's see how you explain this: 97% battery level put the cable to charge and immediately (less than 1second) jump to 100%
    It's embarrassing for Apple to make an attractive phone but not to be able to keep battery management under control in 2017.
     
  9. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #9
    As already mentioned in this thread multiple times. The battery meter is not 100% actuate, it is merely an estimate. Jumps like that signal issues with the battery itself. There is nothing wrong with Apple and "battery management". Battery percentages are ALWAYS an estimate because battery health fluctuates 1000 times a day based on what the battery is doing, the temperature it is in and so on.
     
  10. Daniel80 macrumors member

    Daniel80

    Joined:
    Jun 5, 2016
    Location:
    Romania
    #10
    Do you say it's normal to jump 97% to 100% in less than 1 sec?
    Let's be serious, I had Android and Windows Phone and I have not seen so many "wonderful" things like Apple.
    Let's get to know Apple but when I see the problems they have with their batteries and their management ask me questions.
     
  11. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #11
    Again, without knowing the health of the battery or the load that the battery is under, no one can claim if its normal or not. There are too many factors involved to say something is "normal". This has absolutely nothing with Apple. Every single battery will behave the same. Its not like Apple is making the battery, so lets not be silly. A battery is literally a combination of chemicals, therefore different results will occur. There is intended behavior, but intended does not make it fool proof.
     
  12. sacha_g88 macrumors newbie

    Joined:
    Aug 2, 2017
    #12
    Just curious. An app like Battery Life reports the current level of 'battery wear'. Since the capacity can fluctuate based on what the phone is doing or the environment it is in, the 'battery wear' will also fluctuate since it is representative of how much design capacity has been 'lost'. But this doesn't mean necessarily that the battery has degraded, since the phone may just be doing some heavy lifting like downloading movies or updates, or be at a low charge in the 20s etc... Am I getting this right?
     
  13. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #13
    Kind of. The fluctuation will be about 5% here and there, but it will always return to the "current" health once it recharges to 100%. But battery life is not accurate as its only estimating. The only way to get real time battery health is via Coconutbattery.
     

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