22 weeks in, 87% capacity

Discussion in 'MacBook Air' started by Michael Goff, Dec 14, 2012.

  1. macrumors 603

    Michael Goff

    Joined:
    Jul 5, 2012
    #1
    So, according to coconutBattery, I've had this thing for 22 weeks. Like the title says, the battery can now hold 87% of design capacity.

    Is this normal, or is there something wrong with the battery?

    Yes, this is my main computer.
     
  2. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. For further details, read the CHECKING STATUS AND HEALTH section of the following link.

    The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
     
  3. thread starter macrumors 603

    Michael Goff

    Joined:
    Jul 5, 2012
    #3
    It says 90 cycles and 87% health on iStats and 86% on coconutBattery.

    Am I doing something wrong?
     
  4. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    The 750 cycles is for earlier models. For newer notebooks, it's 1000 cycles. As I said, it will fluctuate up and down over time. It's not a straight decline. Don't worry about it unless it drops below 80% before 1000 cycles. If it does, take it to Apple and let them check to see if it's defective. They usually won't even check unless it's below 80%.
     
  5. thread starter macrumors 603

    Michael Goff

    Joined:
    Jul 5, 2012
    #5
    Maybe you're right.

    I'm just a little paranoid about my 2200$ purchase.

    I hope you understand.
     
  6. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Yep, I understand. I've answered thousands of these questions over the years.
     
  7. macrumors regular

    Joined:
    Aug 5, 2008

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