94% with 21 cyles?

Discussion in 'MacBook' started by presence06, Oct 27, 2009.

  1. presence06 macrumors member

    presence06

    Joined:
    Oct 13, 2009
    Location:
    H-Town
    #1
    New macbook, maybe 4 weeks old?

    Battery claims to be 4months old and I've only drained the battery once to "calibrate" it otherwise kept it around 20% (at lowest)


    this is what Coconut is showing me after 21 cycles.
     

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  2. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #2
    Run the calibration again and see what happens.

    Also, is it considerably colder where you are now? That could influence the readings as cold Li-Ion batteries won't perform like a warm/room temperature unit.
     
  3. presence06 thread starter macrumors member

    presence06

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    Oct 13, 2009
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    H-Town
    #3
    Right now I having it sitting on my desk in the basement. It's cool down here but not freezing/cold. I can tell the desk (wood) is a cool.

    Is that bad for the battery?
     
  4. chrismacguy macrumors 68000

    Joined:
    Feb 13, 2009
    Location:
    United Kingdom
    #4
    To me that doesnt seem very good mileage - my just over 1 year old MacBook still has a charge capacity over 100% (5128 mAh) - I think that Coconut Battery looks at the date of manufacture, so if your MacBook sat on a shelf for 3 months - that would be the discrepancy. My battery has just been subjected to normal daily use and carting about - I havent really put any effort into keeping it in good condition - so you may have a dud battery.
     
  5. skubish macrumors 68030

    skubish

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    Feb 2, 2005
    Location:
    Ann Arbor, Michigan
    #5
    seems to be within spec to me.
    I would see how it is after another 21 cycles.
     
  6. m0no macrumors regular

    Joined:
    Jan 8, 2009
    #6
    I just checked mine and I have 94% with 16 cycles. Age of Mac: 2 months.
     
  7. Vashed555 macrumors newbie

    Vashed555

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    Sep 2, 2009
    Location:
    Ohio
    #7
    Be patient... The data fluctuates. It'll range between 92% and 102% depending on how the battery is reacting. That's all perfectly normal and my PowerBooks and MacBooks all do the same.
     
  8. presence06 thread starter macrumors member

    presence06

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    Oct 13, 2009
    Location:
    H-Town
    #8
    Well good. I used it lastnight and let the MacBook die. I will recharge it answer but I guess from what you guys are saying it's not that big of a deal. Thanks guys.
     
  9. presence06 thread starter macrumors member

    presence06

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    #9
    After 26 cycles, coconut and Istat shows 93%...
     
  10. brendu macrumors 68020

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    Apr 23, 2009
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    USA
    #10
    im at 39 cycles, and 92%.

    ive calibrated once, going to calibrate again soon, and see if it goes up at all.
     
  11. ayeying macrumors 601

    ayeying

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    Dec 5, 2007
    Location:
    Yay Area, CA
    #11
    The battery's still above 80% health. I wouldn't worry about it. Battery's going to degrade, even if you never use it, in fact, if you never use it, it'll die faster.

    I'm at 350 cycles on a 5 month old system and my battery health is around 90% to 94%. It jumps at every recharge.
     
  12. GeekGirl* macrumors 65816

    GeekGirl*

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    Buffalo, NY
  13. dmmcintyre3 macrumors 68020

    Joined:
    Mar 4, 2007
    #13
    That's not good, but it does fluctuate. See the pictures. In 3 cycles it gained 3%. This battery is from '04 in an '05 PowerBook G4.
    [​IMG][​IMG]
     
  14. himanshupant macrumors newbie

    Joined:
    Apr 17, 2010
    Location:
    India
    #14
    pretty weird.... My battery readings too started going for a toss after caliberation.. I am not going to caliberate again.. It ate up one charge cycle and degraded battery health too
     
  15. halisray macrumors regular

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    Nov 7, 2009
    Location:
    MTL
    #15
    it fluctuates a lot. i got mine in november, it has 44 cycles at 93% - but fluctuates from 90% to 96%

    srsly, dont worry about it, just continue calibrating ur battery every month
     
  16. miles01110 macrumors Core

    miles01110

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  17. ulbador macrumors 68000

    ulbador

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    Feb 11, 2010
    #17
    I posted in the other battery thread about this so I won't repeat it all. The genius bar folks replaced my battery that was showing similar stats because it was out of spec.
     
  18. lyons238 macrumors 6502

    Joined:
    Mar 21, 2010
    #18
    dont worry, istat and coconut battery only give averages and they are not totally correct. plus apple told me that its normal for the % to jump up and down depending on how you charge it etc...

    i then had apple run their own battery diagnostic test and my battery is 98.5% after 105 cycles 6 months old. but my istat/coconut usually says 91-96%
     
  19. himanshupant macrumors newbie

    Joined:
    Apr 17, 2010
    Location:
    India
    #19


    What battery diagonistic test ?? Do they have some special software. ? Do we have to send out laptop to the apple store or they carry this out over the counter !!!
     
  20. ulbador macrumors 68000

    ulbador

    Joined:
    Feb 11, 2010
    #20
    When I took mine into the Apple store they booted some special hardware test program off an iPod nano.
     
  21. noah82 macrumors 6502a

    noah82

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    Oct 16, 2008
    Location:
    San Diego, CA
    #21
    That doesn't sound right...I'd take in to the geniuses.
     
  22. lyons238 macrumors 6502

    Joined:
    Mar 21, 2010
    #22
    they have the diagnostics on their external hard drives right at the genius bar. they told me that they fluctuate, especially in istat/coconut. like i said mine was 94% on istat and their diagnostics read 98.5%,
     

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