MacBook Pro 13" battery capacity

Discussion in 'MacBook Pro' started by paperless, Nov 23, 2009.

  1. paperless macrumors newbie

    May 31, 2009
    Hello everyone.

    I have my MBP since last tuesday and during the first and second day the battery was around +/- 5500 mAh (even over the regular capacity) but after i calibrated it the capacity went down to 97% and after staying in 97% for a couple of days i decided to calibrate it again just to see if i could get it to 100% again and now it's down to 94% :(

    Is this something i should worry about? I did the calibration exactly as it says on Apple's support website but still... no help.

  2. Azathoth macrumors 6502a

    Sep 16, 2009
    Margin of error for those measurements is a few percent. dont worry about it.
  3. Paul Lee macrumors newbie

    Nov 24, 2009
    Seoul, Korea
    I have same issue for my new mac book pro 13.3

    I bought it a week ago. Then I found out my battery has been draining until 4892mAh. So I called Apple Service then they replied me "It's normal"

    But what does that mean? In light of other users' references in here, it is abnormal I think.

    Does anyone can answer me how I can fix this problem? Is it possible to me pull up this capacity up to 5400mAh around?:(

    Thanks in advance.
  4. fluffyx macrumors 6502

    Oct 25, 2007
    On a new battery, sometimes the full charge capacity is greater than "designed capacity", and sometimes it's less.

    Unless it's a big difference (80% heath or worse), Apple considers it "within specification."
  5. mrsir2009 macrumors 604


    Sep 17, 2009
    Melbourne, Australia
    The battery percent etc is only approx. So unless its by 10% or something its nothing to worry about and the battery is finy:D

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