Battery won't charge past 99%

Discussion in 'MacBook Pro' started by bluush, May 5, 2007.

  1. bluush macrumors 6502

    Apr 20, 2007
    The magsafe light is red, won't turn green. In the last 2 weeks that I've owned this computer I've never used it without the magsafe adapter so I'm not sure why the battery needs to be charged to begin with? It's sat at 99% now for over 2 hours, magsafe light still red. I've provided a screenshot. Ideas?

    Attached Files:

  2. iHerzeleid macrumors 6502a


    May 5, 2007
    Did you install the Intel MacBook/MacBook Pro battery update?
  3. masse macrumors 6502a


    May 4, 2007
    Alright, I'm new to the forum, have never owned a mac, or even a laptop for that matter.

    I have however been doing my fair share of reading and there are a few other threads like this I've found. The problem is the battery won't attempt to charge unless it is partially drained to prevent overcharging. Since it's had a nearly full charge and has not been using the battery, the charge has not decreased or increased.

    Run the battery down a decent amount and plug in the power adapter and it should charge it all the way up. If not you can always calibrate your battery by draining the power completely and giving it a fresh charge.

    at least I hope I'm partially right :)
  4. 0007776 Suspended


    Jul 11, 2006
    unplug it and let the battery run down and then recharge it, if you leave it plugged in all the time it will eventually cause the battery to not hold as much of a charge as it should.
  5. majordude macrumors 68020


    Apr 28, 2007
    It has to discharge past 97% or 96% before it will charge back up to 100%. This is to prevent overcharging. If it is 97% - 99% it won't charge.

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