iPhone XS Max Please, help me understand my daily battery usage!

Discussion in 'iPhone' started by MacWins, Oct 15, 2018.

  1. MacWins macrumors regular

    MacWins

    Joined:
    Oct 7, 2017
    #1
    Long story short, I can't really decipher the battery usage, on a day, on my XS Max.

    With IOS 11 (until the last update pre-12), It showed the hours in standby and the actual screen on time; now, on IOS 12, on the Max, one day it showed 5h of screen-on and 1.45 h on standby. After about 1 h of non-usage, the standby time remained the same (why??) while the screen on time was reduced considerably (to 3.5 hours)!

    I don’t understand how to read this results, or if I have to set up something in the battery settings.
    It’s not about the usage itself because the battery lasts till bed time without problems, and generally I go to sleep with a 30% residual!

    Here are some screenshots to explain the situation.
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  2. mritech macrumors regular

    Joined:
    Jul 29, 2015
    #2
    Press the button opposite to the 24 hour one and then press the line graph on the actual day and it will show the screen on/ times and usage of all the separate apps

    This is today only

    [​IMG]
     
  3. MacWins thread starter macrumors regular

    MacWins

    Joined:
    Oct 7, 2017
    #3
    Ok, I followed your kind advice and now this is what it shows
    [​IMG]
    While the screen-on time could be plausible, the standby time is not!
    There’s something strange though, I unplugged the charger at 6.43 this morning and now shows only 1.08 hours of standby/screen off!
     
  4. seinman macrumors 6502

    Joined:
    Jun 15, 2011
    Location:
    Philadelphia
    #4
    It’s not telling you how much time the screen was off.

    It’s telling you how much time apps spent running in the background WHILE the screen was off.

    This probably the hundredth time I’ve seen this question between this forum and Reddit, so clearly this is a case of Apple not making it clear exactly what that figure means. Hopefully they clarify in a future update.
     
  5. roncron macrumors 6502

    roncron

    Joined:
    Aug 15, 2011
    #5
    I can’t answer the OP’s question, but I have a similar question about how to interpret the battery stats in iOS 12.

    In iOS 11, the battery stats would show you how much usage you got since the last full charge. Using that and the remaining battery percentage, you could estimate your total battery life.

    For example, if the stats show 7 hours of active usage since the last full charge and you have 30% battery life remaining, you probably have about 3 hours left, or 10 hours total.

    Yes, I know the % remaining is sometimes inaccurate, but this method at least gives you a rough idea of your device’s total battery life.

    With iOS 12, it shows you amount of active use over the past 24 hours, not since last full charge.

    Is there a way to get an estimate of your battery life in iOS 12?
     
  6. EM2013 macrumors 68000

    EM2013

    Joined:
    Sep 2, 2013
    #6
    The new battery thing is trash. Haven’t charged my device for a full day and this is what it says.
     

    Attached Files:

  7. boomer11 macrumors regular

    Joined:
    Sep 23, 2014
    #7
    i dont understand. why is it trash?
     
  8. EM2013 macrumors 68000

    EM2013

    Joined:
    Sep 2, 2013
    #8
    It’s showing 1h 58m of screen usage in 24 hours when it should say the total usage.
     

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7 October 15, 2018