Macbook Battery Health?

Discussion in 'MacBook Pro' started by Nuks, Dec 11, 2006.

  1. Nuks macrumors 6502a

    Joined:
    Feb 25, 2006
    #1
    I've had my macbook for under three months, and using the iStat Pro widget, my battery health is at 89%. Is this to be expected? It seems awfully low..
     
  2. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #2
    Have you calibrated it recently? How many cycles do you have on it?
     
  3. Canerican macrumors regular

    Joined:
    Jul 22, 2006
    #3
    How many times should you cycle before calibrating? And what effects does battery health have?
     
  4. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #4
    Apple recommends calibrating your battery every couple of months. Your battery health is just your battery's maximum capacity. This decreases over time as your battery wears out from a variety of factors. Obviously a decreased maximum capacity means less runtime on battery power.

    89% capacity after three months is low. Knowing the number of charge cycles gives a very rough approximation of how much the battery's been through, but battery lifetimes vary significantly. Calibrating your battery allows it to "stretch" through it full capacity and makes sure your computer is receiving accurate charge data from the battery, and thus accurately displaying your maximum and current capacities.
     
  5. Nuks thread starter macrumors 6502a

    Joined:
    Feb 25, 2006
    #5
    Alright, it's been through 37 cycles thus far. I have calibrated it once since getting it. I tried to do it the other day, but it wasn't a complete calibration, so I guess it doesn't really count. I'll bump this thread again when I have time to calibrate it.
     
  6. Nuks thread starter macrumors 6502a

    Joined:
    Feb 25, 2006
    #6
    I calibrated it today. With iStat Pro I'm getting 42 cycles and 88% remaining, and with Coconut, I'm getting 85%. I've had it just shy of 3 months. Is that normal??

    Bump.
    I just need to quickly figure out about the battery so I can decide whether or not to give Apple a call.

    Thanks.
     
  7. Elphaba macrumors regular

    Elphaba

    Joined:
    Jun 4, 2006
    #7
    Hmm, the same thing happened to my Macbook. Strangely enough, it also happened during the third month...

    [​IMG]

    Nov.9 shows a sudden drop to 82% capacity.. but then it slowly goes all the way back up to 99% :eek: I think you should just wait and hopefully it'll go back to normal like mine did :)
     
  8. Nuks thread starter macrumors 6502a

    Joined:
    Feb 25, 2006
    #8
    Hmm, that's really strange. Did you calibrate it or anything? Or did it just return to 99% on its own?

    I guess I'll wait it out and see what happens.
    Thanks.
     
  9. Elphaba macrumors regular

    Elphaba

    Joined:
    Jun 4, 2006
    #9
    It just went back to 99% on its own :) The only time I calibrated the battery was when I first bought it back in September. Good luck!
     
  10. hahahjoe macrumors newbie

    Joined:
    Mar 18, 2008
    #10
    i have the same thing

    142 cycles
    10 months old

    only 52% left. i think i'll call apple care


    macbook 13".
     

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  11. isctony macrumors newbie

    Joined:
    Jan 25, 2009
    #11
    Hmm mine seems to fair a little better. I try to follow the calibration instruction and do it every time i remember, i also have set it in my iCal to remind me when its due doing. I also use my macbook everyday as my main computer as i am a student.

    [​IMG]
     
  12. dukebound85 macrumors P6

    dukebound85

    Joined:
    Jul 17, 2005
    Location:
    5045 feet above sea level
    #12
    Mine is this. Is this normal?
     

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