Calibration confusion

Discussion in 'MacBook Pro' started by Saberon, May 29, 2011.

  1. Saberon macrumors 6502a

    Sep 16, 2008
    I just recently bought a MBP in the last week or two and had a question about the Apple support document regarding calibration of the battery indicator.

    It's all good until step 3. It says to run the Mac off battery until it gets low and powers itself off (sleep). Can it be turned off/on during that time or does it have to be from 100% charge all the way down to 0% in 1 "session" if you will? Can I run it down to 0% over a couple days as long as I don't plug it in during that time?

  2. GGJstudios macrumors Westmere


    May 16, 2008
    You can, but it takes much longer to calibrate that way. Just leaving it on and letting it drain, even if you're not using it, will make the calibration process faster. Use Caffeine to make sure it doesn't go into sleep mode prematurely, again, so it will drain faster. This should answer most, if not all, of your battery questions:
  3. MacBookPro13" macrumors 6502a


    Jan 25, 2011
    This bit?

    How can you turn it off when it's already gone off?

    Is there a way of "turning it off" without having to wait the five hours?
  4. simsaladimbamba

    Nov 28, 2010
    Why the need to turn off? The five hours are needed to fully discharge the battery. You can't accelerate the process by turning the Mac off.

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