Battery only charges to 99%?

Discussion in 'MacBook Air' started by Rooskibar03, Jan 7, 2011.

  1. macrumors 65816

    Rooskibar03

    Joined:
    Feb 5, 2007
    Location:
    State of Denial
    #1
    I've had my 11" ultimate for about 3 weeks. Its mostly used by the wife around the house so I never really noticed before that the battery never charges to 100%.

    I'll leave it plugged in overnight. Open it up and it tells me it charged, however as soon as I unplug the cord it reads 99%.

    Does anyone ever see 100%? I know it really has no bearing on battery life, which is great on this machine, but all my previous laptops have said 100% when fully charged?
     
  2. Moderator emeritus

    Hellhammer

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #2
    http://forums.macrumors.com/showpost.php?p=9875442&postcount=23
     
  3. macrumors regular

    Joined:
    Jul 27, 2008
    Location:
    Albany, NY
    #3
    Also one small note, there's really no point to get obsessed with this "100% charge". In fact, for a Li-ion type of battery, the battery will last the longest if it's always used within 30-70% range. When it stays completely drained or maximum charged over a period of time, it's when the battery gets damaged the most.
     
  4. thread starter macrumors 65816

    Rooskibar03

    Joined:
    Feb 5, 2007
    Location:
    State of Denial
    #4
  5. macrumors newbie

    Joined:
    May 13, 2014
    #5
    Same issue with my brand new iPhone 5S.
     
  6. macrumors demi-god

    Meister

    Joined:
    Oct 10, 2013
    #6
    You can check your batteries state under:
    :apple: --> about this mac --> system report --> power
     
  7. macrumors newbie

    Joined:
    May 13, 2014
    #7
    I'm aware of that. It was not the focus of this discussion or my post.
     
  8. Meister, May 13, 2014
    Last edited: May 13, 2014

    macrumors demi-god

    Meister

    Joined:
    Oct 10, 2013
    #8
    Your question was about your batteries status. What percentage it shows is irrelevant.

    If you know where to look at your battery status then I have no idea what this thread is about.
     
  9. macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    上海 (Shanghai)
    #9
    If you leave it plugged in all the time, it will show 100% (because it stopped charging), but the battery is slowly discharging over time. I think it has to drop to 96% before it goes back into charging mode. If it kept trying to charge it every time it was less than 100%, the battery would be shot very quickly.
     

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