Battery Calibration Questions

Discussion in 'MacBook Pro' started by neteng101, Oct 7, 2009.

  1. neteng101 macrumors 65816

    Jan 7, 2009
    So I have read this...

    For step 1 - the battery meter must read 100%? My battery isn't charging but normally drops from 100% over time to 95% then recharges. So I need to get it to 100% before starting calibration? Right now its at 98% and not charging.

    For step 5 - what do people do? Wait a whole 5 hours with the machine sleeping? Or what do they mean by turn it off? I was thinking (since I can) of yanking the battery while its in Safe Sleep, which will turn it off but still retain my sleep status, without requiring a whole 5 hours of waiting?
  2. santos79 macrumors regular

    Feb 25, 2009
    For step one: If it is at less than 95 percent it should charge to 100%. If it doesn't show 100%, maybe that's because it needs to be calibrated.;)

    Step 5 makes no sense at all the way it is worded. Once it automatically goes to sleep the only way to turn it off is to first plug it in again. But there is still some juice left in the battery, so I wouldn't turn it off and then plug it in again right away.
    What I do is leave it in an unplugged state for at least 5 more hours (usually overnight) after it goes to sleep automatically to make sure the battery has drained completely.
  3. neteng101 thread starter macrumors 65816

    Jan 7, 2009
    Step 5 is a big pain - I'd be out of the machine for a while in order to do the calibration.

    It does charge when it hits 95% but I suppose the way to do it is to unplug it, let it drop below 95%, plug it back in, wait for 100%, wait for 2 hours, the move on.

    Its no wonder that a lot of people don't bother, the process is just rather lousy and tedious to do.
  4. Richard1028 macrumors 68000

    Jan 8, 2009
    I just put a DVD movie in before going to bed and mute the sound. Do this on a night where you don't need to be mobile the next day.

    Or... just load any Adobe application. :D
  5. iShater macrumors 604


    Aug 13, 2002
    Where did you get this information? I haven't read this before.
  6. iLog.Genius macrumors 601


    Feb 24, 2009
    Toronto, Ontario
    Apple Support page. They have so many versions on how to calibrate the battery. Some more clear than others but they all do the same thing.
  7. neteng101 thread starter macrumors 65816

    Jan 7, 2009
    Genius! That would work for me - just put on some long Youtube video or something with a mostly drained battery - I can time draining the battery down somewhat, but still be able to use it till I go to sleep and let it die on its own. Plug in charger in morning, off to work, and then back home, its all done. :cool:
  8. elmz macrumors regular

    Apr 22, 2008
    I usually don't do step five. I boot into Windows and play WoW or some sort of 3D gaming, this will drain your battery completely in no time without waiting 5 hours. You'll know it worked because once the machine shuts down, you won't be able to turn it back on =). Then allow it to fully recharge, done!
  9. santos79 macrumors regular

    Feb 25, 2009
    Well if you haven't calibrated your battery then! Step five is there for a reason.
    You've only completed step four: "when the battery gets very low, the computer will automatically go to sleep".
    You can't turn the computer on after that, without plugging it in. But the battery still has some juice left that it keeps as a reserve. Hence the five hours it needs to be left unplugged in step five.
  10. Richard1028 macrumors 68000

    Jan 8, 2009
    I've done this too. Load up a dozen video pages at once and watch the juice disappear from your battery right before your eyes.

    Make sure you're using the King of all cpu-sucking-flash-hating browsers (Safari).
  11. icedd macrumors 6502


    Apr 22, 2009
    Considering that I leave my plug in most of the time, I simply let the laptop run completely dry and charging it back up once a month.
  12. mrsir2009 macrumors 604


    Sep 17, 2009
    Melbourne, Australia
    Each version is for a different type of Apple laptop I think :cool:

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