MBP battery calibration not helping?

Discussion in 'MacBook Pro' started by drossad, Feb 14, 2009.

  1. drossad macrumors regular

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    #1
    About a week ago, my battery went from a steady 96-98% capacity/health down to around 90%. So, I did my usual calibration (as I do every 1-2 months). Strangely the total capacity went down to 85%. I calibrated it two more times and it still is the same. The best capacity reading I get is 90% while it is being used on battery power only. So, it seems to fluctuate as the battery drains.

    I don't think it's normal for calibration to actually make the battery capacity worse. Thoughts anybody?

    I've attached a screenshot of my most current coconut battery reading.
     

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  2. kastenbrust macrumors 68030

    kastenbrust

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    #2
    Try using iStat to give us a screen shot of your battery health rather than coconut battery, which is increidbly unreliable.
     
  3. drossad thread starter macrumors regular

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    #3
    Here ya go.
     

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  4. drossad thread starter macrumors regular

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    #4
    Plus here is the coconut battery screenshot taken right after the iStat one.
     

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  5. drossad thread starter macrumors regular

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  6. Kevlar macrumors 6502

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    #6
    Well Apple says 300 cycles the battery health should be above 80%. So at 150+ cycles you are well within that. If you drop below 80% before 300 cycles, call apple care or go to an apple store and they might replace it as defective.

    http://www.apple.com/batteries/notebooks.html
     
  7. drossad thread starter macrumors regular

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