battery showing 97% when full?

Discussion in 'MacBook Air' started by moveright, Apr 19, 2012.

  1. moveright macrumors member

    Joined:
    Apr 18, 2012
    #1
    My battery is full but it shows 97%. magsafe cord shows green. I rebooted but still the same. odd.

    Any ideas?

    MBA 13/128 4 days old.:confused:
     
  2. ECUpirate44 macrumors 603

    ECUpirate44

    Joined:
    Mar 22, 2010
    Location:
    NC
  3. moveright thread starter macrumors member

    Joined:
    Apr 18, 2012
    #3

    odd. acceptable, but odd.

    thank you.
     
  4. east85 macrumors 65816

    east85

    Joined:
    Jun 24, 2010
    #4
    You may need to cycle your battery. Often times if it starts lingering under 100% there's a good chance you need to do a battery cycle to keep your MacBook in good health.

    Please read the following.

    http://guides.macrumors.com/Laptop_Battery_Guide
     
  5. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #5
    The battery may appear to stop charging between 93 percent and 99 percent, because the batteries are designed to avoid short discharge/charge cycles in order to prolong the overall life of the battery.

    This should answer most, if not all, of your battery questions:


    You don't need to cycle the battery. Just run on battery until it drops below 93% and it will charge again.

    That is not accurate. Read the WHAT IS A CYCLE section of the Battery FAQ.
     
  6. firemedicmark macrumors 6502

    Joined:
    Sep 4, 2005
    #6
    Not to worry, mine does this all the time. Maybe a calibration??
     
  7. east85 macrumors 65816

    east85

    Joined:
    Jun 24, 2010
    #7
    Thanks for clearing up that line GGJ.
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries.

    Read my earlier posts and the Battery FAQ for the facts about this issue.
     
  9. firemedicmark macrumors 6502

    Joined:
    Sep 4, 2005
    #9
    Huh, thanks for the info...guess I'm used to the old style batts.
     
  10. Hichisky macrumors member

    Joined:
    Nov 5, 2010
    #10
    Yeah, it simply does not go into charging mode once it is over a certain capacity. If you run the capacity down and then charge to 100% at once, you can remove the cable and let it go down a few percent. Connect it back and charging will not be re-enabled.
     
  11. moveright thread starter macrumors member

    Joined:
    Apr 18, 2012
    #11
    I removed the cable and am wearing it down. currently at 32%. we will see.

    honestly, I didn't know about the battery FAQ. I'm overwhelmed as a new Mac user. I'm finally getting really comfortable with it. To be fair, I am quite used to Linux so this hasn't been so bad but still.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    It doesn't have to be overwhelming at all. Just run on battery when you need to, and run on AC power whenever you can. As long as you're not running on AC power all the time, you'll be fine. Disregard any comments about calibration. Your battery doesn't need it.

    Since you're a new Mac user, this may be useful:

    Helpful Information for Any Mac User
     

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