MBP 13" battery capacity: Where did I go wrong?

Discussion in 'MacBook Pro' started by AnodizedFish, Jul 31, 2010.

  1. AnodizedFish macrumors member

    Joined:
    Jul 19, 2010
    #1
    My mid 2009 13" MBP's current battery capacity:
    [​IMG]

    I thought Apple said that it can go up to 1000 charge cycles before loosing 20% of its original charge. Is it because the battery is faulty or am I at fault?:( Today, the capacity fluctuated from 83% to 77% and then back to 79%. Well, something is wrong... or maybe it's just me...:confused:
     
  2. spinnerlys Guest

    spinnerlys

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  3. AnodizedFish thread starter macrumors member

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    Jul 19, 2010
  4. AnodizedFish thread starter macrumors member

    Joined:
    Jul 19, 2010
    #4
    Okay... so I've calibrated my battery and it shows that my actual battery capacity now is only 81%... but isn't that too low for a 108 cycles?? Apple said 1000 cycles, so I my battery reached 80% after only 100+ cycles.
    I know that gaining back the lost capacity is practically impossible... at least if I know what I did wrong to make the battery's capacity go that low that quickly, I can sleep well tonight. :(
     
  5. Patrick J macrumors 65816

    Patrick J

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    Mar 12, 2009
    Location:
    Oporto, Portugal
    #5
    If it goes below 80% go back and ask for a replacement. If it doesn't, you can't do ****. Calibrating a battery too much just kills it even faster.
     
  6. AnodizedFish thread starter macrumors member

    Joined:
    Jul 19, 2010
    #6
    Okay then, thanks for the replies! It's 80% today, hopefully I could replace it with a new one :D
     
  7. dukebound85 macrumors P6

    dukebound85

    Joined:
    Jul 17, 2005
    Location:
    5045 feet above sea level
    #7
    Is 88% left with 42 load cycles in 12 months good? My mb was purchased in Jan so I assume it was manufactured a year ago in regards to the 12 months

    Or is this a defective batt? Seems like a quick drop off imo or is it normal? I calibrate it fairly often
     
  8. arcite macrumors 6502a

    arcite

    Joined:
    Sep 6, 2009
    Location:
    Cairo, trapped in a pyramid with my iphone
    #8


    That doesn't seem like very many cycles. I already have 23 cycles and only on my first month ~ 96% health. I run off battery virtually every day so it'll be interesting to see how it holds up.
     
  9. akbc macrumors 6502

    Joined:
    Jul 11, 2008
    #9
    Mid-2009 MBP, carry it outside quite often. And here's my status:

    So, I'm kind of worried as well, but more worried about some of the previous posters...
     

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  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    It sounds like you don't run it on battery often enough, or you'd have more cycles by now. If you run it down to around 50% every 2 or 3 days, and if you calibrate once a month, you should have at least 60 cycles by now, preferably more.
    Yours looks fine. Again, be sure to calibrate, or the readings can't be trusted.
     

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