Another battery thread

Discussion in 'MacBook Pro' started by Mpulsive81, May 10, 2007.

  1. Mpulsive81 macrumors 6502

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    #1
    I don't want to hijack anyone else's so i figured i'd open my own. I have 168 cycles and my battery is at 87%. I've downloaded all updates, naturally. I'm curious if this would classify as a defective unit. This would be the results after a full cycling of the battery. I'm not sure what the terms are to classify a battery as defective, but being that this is my only computer at this point, I'd really like to ensure I get every ounce of battery life I can get.
     
  2. coledog macrumors 6502a

    coledog

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  3. Mpulsive81 thread starter macrumors 6502

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    #3
    That's what I was looking for. Now i just need to figure out if they consider 87% a low charge capacity as defined in the link you provided:

    "Battery exhibits low charge capacity/runtime when using a fully charged battery with a battery cycle count (as shown in System Profiler) of less than 300. "

    I received the 87% from the istat pro widget that came from apple's website.
     
  4. coledog macrumors 6502a

    coledog

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    #4
    Just as a comparison, my battery says 98% after 34 cycles.
    I'm actually doing a "calibration" (full charge then full discharge) as i type hoping I can get better numbers.
     
  5. Mpulsive81 thread starter macrumors 6502

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    #5
    Yeah these are my results after a calibration.
     
  6. himansk macrumors regular

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    Oct 16, 2006
    #6
    i went to the apple store with 30 cycles 92% battery, trying to explain the genius that it actually shows 87% right after calibration. according to him this is normal wear and that he cannot do anything about it. But he did record the issue of short battery life i complained about, and if this continues apple will have to replace the battery for me.
    in short, i think that after 160+ cycles your battery appears to be in good condition if it is at 87% wear.
     
  7. Mpulsive81 thread starter macrumors 6502

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    #7
    Here's what i'm thinking. If i've lost 13% of my battery life in 164 cycles, i'll be at 74% in another 164 cycles. At a hair over 300 cycles, losing 26% of my battery life is worrysome. I'm not gonna be a brat about it, but i'll go by and see what they say. Or maybe i'll call the apple store and see what they think.
     
  8. Nuks macrumors 6502a

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    Feb 25, 2006
    #8
    I have 102 loadcycles and my battery is at 55%. Yours doesn't sound too bad to me..
     
  9. notsofatjames macrumors 6502a

    notsofatjames

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    #9
    that sounds bad. im at 66 cycles to 92%battery health according to iStat. I suppose i should check system profiler for more accurate results...
     
  10. coledog macrumors 6502a

    coledog

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    #10
    WOW...to me that sounds terrible! How old is you laptop?
     
  11. Mpulsive81 thread starter macrumors 6502

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    #12
    now *you* should be on the phone w/ apple on that one.
     
  12. coledog macrumors 6502a

    coledog

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    #13
    I second that!
     
  13. curiosa863 macrumors member

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    #14
    Where in system profile do i see battery cycles? i'm on an ibook g4 if that matters.
     
  14. coledog macrumors 6502a

    coledog

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  15. bmcgrath macrumors 65816

    bmcgrath

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    London, United Kingdom
    #16
    The genius bar guy's told me that 85% was normal wear and tear for 110 cycles and 8 months old. But when I called Apple care and told him about my battery issues he just went about getting me a replacement and didn't ask too many questions about it. :)
     
  16. Mpulsive81 thread starter macrumors 6502

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    #17
    Well I called Apple yesterday and they're sending me a new one. I just had to give them a CC # so they can put a $1 hold on it, just in case i decided to keep both batteries.
     
  17. coledog macrumors 6502a

    coledog

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    #18

    Just 1 dollar?? That's awfully cheap for a battery...how would they know whether it's defective or not?
     
  18. Mpulsive81 thread starter macrumors 6502

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    #19
    They're not purchasing it back for a dollar, it's a hold they put on my credit card. So lets say I decide I want the new battery and don't wanna send them my old one, they'll have a way to charge me the $129 for a new one. It already qualified for the warrenty replacement over the phone, so it's classified as "defective" already, i don't have to worry about messing with it anymore. ;)
     

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