91% battery life after 30 charge cycles?

Discussion in 'MacBook' started by iObama, Mar 18, 2010.

  1. iObama macrumors 6502

    iObama

    Joined:
    Nov 16, 2008
    Location:
    SF
    #1
    Hi all -

    I noticed that my MacBook doesn't run as long as it used to before I have to charge it again. I downloaded CoconutBattery, and it tells me that my battery is down to 91% of its original capacity after only 30 charge cycles. It's 5 months old according to CB, and I bought it new on Dec. 24th. (It's a Unibody White...)

    Is this normal, or should I take it into the Apple Store for a replacement?

    Thanks!
    iObama
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    Normal. Battery capacity readings aren't accurate to more than 5% or so anyways.
     
  3. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #3
    That sounds about right for a battery of that age. They usually go up and down about 15% in the first year or so. Then they start dropping all on their own.
     
  4. sml238 macrumors regular

    sml238

    Joined:
    Feb 26, 2010
    #4
    yeah mine has like 60 charge cycles and ranges anywhere from 88%-97%

    at first i was worried but i was told it is normal.
     
  5. Pax macrumors 6502a

    Joined:
    Dec 12, 2003
    #5
    Search around on this site, there are loads of threads on this. It's fine.
    I'm surprised you can notice a 9% difference, I would think that's too small to be noticeable given the difference in use pattern from charge to charge.
     
  6. Purpin macrumors newbie

    Joined:
    Dec 1, 2009
    #6
    Age of mine is 9 months, but battery max is still 91%; my school makes us use laptops, so we have to carry it back and forth. I've run completely out about 40 times :/
     
  7. testcard macrumors 68030

    testcard

    Joined:
    Apr 13, 2009
    Location:
    Middle England
  8. halisray macrumors regular

    Joined:
    Nov 7, 2009
    Location:
    MTL
    #8
    no big deal.. after 38 cycles I have 94% .. but it drops to like 91% and then back up to 97%... etc...


    isn't accurate at all
     
  9. testcard macrumors 68030

    testcard

    Joined:
    Apr 13, 2009
    Location:
    Middle England
  10. sml238 macrumors regular

    sml238

    Joined:
    Feb 26, 2010
    #10
    mine usually doesnt go above 94% is this a problem?
     
  11. Vel macrumors member

    Joined:
    Jul 5, 2008
    #12
    Only 30 cycles in 4months...do you use your laptop...
    Anyway, mine is 532 cycles with a health status of 96%...according to iStat...but I do only charge my laptop when it drops to less than 10mins remaining on the battery, then unplug it as soon as it fully charges...
     
  12. BigTroll macrumors member

    Joined:
    Mar 21, 2010
    #13
    for some reason my MacBook is over 100 percent and 335 cycles
     
  13. testcard macrumors 68030

    testcard

    Joined:
    Apr 13, 2009
    Location:
    Middle England
    #14
    You're living your life backwards?
     

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