Idle Battery drain 7+

Discussion in 'iPhone' started by Jmgilliam18, May 11, 2017.

  1. Jmgilliam18 macrumors member

    Jmgilliam18

    Joined:
    Apr 24, 2017
    #1
    Hey guys, new iPhone user here (last 2 weeks) and am loving the iPhone 7+ so far. Coming from a Samsung Note the battery life is amazing.

    Question though... at first I would see no drain overnight when unplugged. It would be the same as when I sat it on the nightstand. Or when it was on my desk unused during the day it would be the same as when I sat it down. Now I've noticed it draining some overnight when idle. Last night it drained about 4% (8 hours) and I even had it on low battery usage setting.

    Is this normal and how can I narrow down what is causing the drain?

    It also seems like it is draining more during use than originally. I wonder if I've changed a setting I don't realize but don't know how to tell for sure.

    Thanks.
     
  2. Shadowbech macrumors 68040

    Joined:
    Oct 18, 2011
    #2
    It's normal. I typically lose 2-3% and sometimes 5% overnight and not overly concerned about it. I'd say if it's more than 10% over 8 hours then something was running in the back ground.
     
  3. Radon87000 macrumors 603

    Joined:
    Nov 29, 2013
    #3
    If you have charged it to 100% or the battery level is around 98% then it wont drop. Maybe 1%. But if its below 80 then it will drop 4% every 8 hours or so
     
  4. Jmgilliam18 thread starter macrumors member

    Jmgilliam18

    Joined:
    Apr 24, 2017
    #4
    Thanks. That makes sense. Now that I think about it, the times it has stayed the same it was 100% or high 90's. Lately I've been not charging it overnight so it doesn't run up to 100% and overcharge overnight so it's been around 50-60% at night - last night was 91% and went down to 88%.
     
  5. cakebytheocean macrumors member

    Joined:
    Apr 3, 2017
    #5
    Does anyone know the rationale behind this? Is this by design?
     
  6. Jmgilliam18 thread starter macrumors member

    Jmgilliam18

    Joined:
    Apr 24, 2017
    #6
    Good question. No idea.

    Maybe because when it's at 100 it could be all the way to 100 or just barely touching 100. Evidently 100% has a bigger range than a typical %
     
  7. BigMcGuire Contributor

    BigMcGuire

    Joined:
    Jan 10, 2012
    Location:
    California
    #7
    It is by design - most manufacturers don't report true % ratings past 90% to allow for trickle charging. Battery % is very difficult to get accurately. The 6s+ will continue to charge for up to an hour past 100% --- and I notice it stays at 100% far longer when I do that (using coconutBattery). I too notice that sub 50% it drops to 0% far faster than 100% to 50%.

    As far as standby battery life - depends on how far you are from a cellphone tower. If I sleep with 100% reception, I usually have 0% battery loss overnight. If I have 1-2 bars I'll have 3-5% battery loss. At my house, I have 1-2 bars - ever since Verizon did WiFi calling, I have 1-2 bars of cellular with VZW WiFi - and I lose 1-2% overnight.
     
  8. cakebytheocean macrumors member

    Joined:
    Apr 3, 2017
    #8
    So whats the best way to get an accurate line of sight into battery life?

    Is there a figure equivalent to android's screen on time?
     
  9. QueenTyrone macrumors 6502a

    QueenTyrone

    Joined:
    Sep 21, 2016
    #9
    Between my battery life app (jailbreak) and the stock battery it's about 3-5% difference, my battery wear is 2% so 98% capacity.
     

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