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    MBP Batt calibration problem

    Discussion in 'Apple and Mac OS X' started by Amir 55, Aug 25, 2009.

  1. Amir 55

    Amir 55 Notebook Enthusiast

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    Hi all
    I got a mid 2009 MBP last week, I decided to calibrate its battery based on apple instruction, I charged it fully, after 2 hours I disconnected it for complete discharging, but I left my MBP and it went to sleep for 10 minutes, I turn it on again and finished calibration process, Is it necessary to re-calibrate it because of that 10 MINs sleeping?
    TX
     
    Amir 55, Aug 25, 2009
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  2. Tinderbox (UK)

    Tinderbox (UK) BAKED BEAN KING

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    Once you fully discharge the battery apple recommend leaving the notebook for 4 hours :eek: , before recharging it.

    As long as the battery was fully discharged, eg, the notebook turned itself off and then you charged it, then it will be fine.
     
    Tinderbox (UK), Aug 25, 2009
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  3. tenderidol

    tenderidol Notebook Evangelist

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    Hmmm.... I haven't done this procedure yet on our 13 and 15 MBPs. I guess I can still do it, right? It's been about a week and they were used on and off with battery discharging some. It's actually going to be difficult to coordinate this, since the battery lasts too long and we are supposed to let it sit for 5 hours!
     
    tenderidol, Aug 25, 2009
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  4. Tinderbox (UK)

    Tinderbox (UK) BAKED BEAN KING

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    I would give it a hour to let the battery cool , and then charge it up with the notebook turned off.
     
    Tinderbox (UK), Aug 25, 2009
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  5. Amir 55

    Amir 55 Notebook Enthusiast

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    Thank you. :)
     
    Amir 55, Aug 28, 2009
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  6. tallan

    tallan Notebook Deity

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    A little detail: you actually want to let the MBP turn itself off and then wait until the sleep light stops flashing and goes out for good before recharging. As long as there's current for that light the battery isn't truly empty: it usually takes from 3 to 5 hours to go flat flat.
     
    tallan, Aug 28, 2009
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  7. tenderidol

    tenderidol Notebook Evangelist

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    Yeap... that's what I did. Let it turn itself off, wait 4 hours and charge it (while it is off). How often do we need to repeat this procedure? Once every 6 months?
     
    tenderidol, Aug 28, 2009
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  8. Tinderbox (UK)

    Tinderbox (UK) BAKED BEAN KING

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    Every 2-3 months i would say.
     
    Tinderbox (UK), Aug 28, 2009
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