Brand New MacBook fully charged, battery indicator only shows 97%

Discussion in 'MacBook Pro' started by StuartGaia, May 11, 2008.

  1. StuartGaia macrumors newbie

    May 11, 2008
    I got my wife a brand new MacBook for her birthday a week ago. The first couple of days, when fully charged it showed 100% on the battery charge indicator (upper right of screen). Then over a week's time it dropped gradually to where now it only shows 97% when the thing is fully charged (overnight).

    We went to 2 Apple Stores and in both places their 'MacGenius' people gave what I felt were bullsh*t answers about what was going on. I feel that they are covering up an issue they know about. I feel it is either bad design, or bad implementation, for a week old laptop to not be able to achieve 100% charge after an all night charge.

    Am I missing something? Has anyone else experienced a similar problem?

    I myself have a 1 year old MacBook that gets to 100% every time I charge it. Sure the battery doesn't last as long as when it was new, but at least I know it's getting to 100% of the charge that it is still capable of.
  2. siurpeeman macrumors 603


    Dec 2, 2006
    the OC
    it's a protective measure to prevent too many charge/discharge cycles, saving the life of the battery.
  3. eXan macrumors 601


    Jan 10, 2005
    Sometimes computer draws more power than the power supply can deliver so it drains the battery a bit. The reason it doesnt recharge right away is because Apple set a limit to when start recharging - I think its 95% and less. Its done to save charging cycles thus giving the battery longer life.

    Or if you unplug the power for a short time draining only a couple of % and then plug it in again the battery wont recharge for the same reason.

    No need to get mad.
  4. shoarthing macrumors member

    Dec 4, 2005
    . . the issue is with the displayed [& estimated] battery life, not with the true life: the calibration link in psychofreak's post, or this more recent one, will sort you out.

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