MacBook Pro Battery Capacity Degrading Fast?

Discussion in 'MacBook Pro' started by pinoyplaya, Jun 29, 2009.

  1. pinoyplaya macrumors regular

    Joined:
    Mar 16, 2009
    #1
    Is it me or is the new MacBook Pro batteries are degrading fast?

    I use Coconut Battery and did calibrate the battery the first time I got it. So far, I have put only 5 cycles on the battery.

    Here's the Coconut Battery stats...


    [​IMG]


    After only 4 days of normal use the battery capacity dropped by over 100 mAh. I rarely use my laptop using the battery.
     
  2. glavoie84 macrumors regular

    Joined:
    Jun 23, 2009
    #2
    Not that bad, mine is at 5351 right now, after 10 cycles. Actually this number will vary quite a bit. The calculated battery capacity depends on a lot of factor. For exemple, if you put a high load on the battery (100% CPU usage until it's depleted), it will appear as having less capacity. If you leave the laptop idling until the battery is dead, it will appear as having a higher capacity. Any rechargeable battery will act like this. Mine vary between 98% and 99%. Unless your battery drop much faster, and by much faster I mean by many percent and not by a few mAh, I wouldn't take care about it. A battery slightly above or under specified capacity is normal. All batteries are not made equal.
     
  3. TK2K macrumors 6502

    TK2K

    Joined:
    Jun 4, 2006
    #3
    have you checked activity monitior?
     
  4. alexboy45 macrumors regular

    Joined:
    Nov 7, 2007
    #4
    i found that the battery changes its mind. at one point mine was at 92% but it is now at 100% at 132 cycles try using on the battery more or calibrate it.
     
  5. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #5
    100 mah out of thousands is well within the error margin of any battery capacity reporting software.
     
  6. karlinel macrumors newbie

    Joined:
    Oct 15, 2011
    #6

    Mine was worst, I'm at 127 cycle count and my battery capacity according to coconut battery is just at 84%. is this normal? or I really got a defective battery? I have a macbook pro early 2011. Sometimes it goes up to 91%, they 87%.. this is sooo frustrating...
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    It's perfectly normal for battery health to fluctuate up and down over time. Your battery is not defective. This should answer most, if not all, of your battery questions:
     
  8. sweetbrat macrumors 65816

    sweetbrat

    Joined:
    Jun 17, 2009
    Location:
    Redford, MI
    #8
    It fluctuates constantly. Since I purchased my MBP, I've seen it report anywhere from 95% of capacity to 100% of capacity. It currently says 96% after 27 load cycles. I wouldn't worry unless it drops drastically and stays that way.
     
  9. Sparticu$ macrumors member

    Joined:
    Dec 14, 2009
    #9
    I think it's fine you have to remember there's a chip inside the battery determining all of this based on conditions of the battery it may not be entirely true.
     

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