Battery Calibration: Ok to turn off after first charge is completed?

Discussion in 'MacBook Pro' started by Blue Sun, May 18, 2010.

  1. Blue Sun macrumors 6502a

    Joined:
    Feb 11, 2009
    Location:
    Australia
    #1
    Hi guys

    I've got the 15" MBP with a Core i5 and I've nearly finished calibrating the battery.

    After the MBP became fully charged, I left it for 2 hours, used it a bit, then shut it down. I've been using the MBP as much as possible (to discharge the battery) for a few days now. But I have been shutting the machine down when not in use.

    Currently the machine is resting with 0% charge for a minimum of 5 hours (like Apple suggests). I'm wondering if by shutting it down those few times, will it affect the battery calibration?
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    Not significantly. The amount of worry surrounding battery calibrations is sadly disproportionate to the effect of taking one small misstep during the process.
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    That's not the way to calibrate. After it's been fully charged for 2 hours, unplug it and let it run completely down. Do not shut it off. Let the battery drain until it shuts itself off. Then let it sit for 5 or more hours before plugging it back in. This is easy to do overnight.

    Calibrating a portable computer battery
     

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