Leaving battery out

Discussion in 'MacBook' started by GeneKam, Mar 16, 2008.

  1. GeneKam macrumors regular

    Feb 3, 2008
    Mississauga, ON
    Well here is a story, me and my friend got our macbooks around the same time, and well mine went through 78 cycles and his went through 44. my baterry health is at 94 and his is at 100%. Well i do understand the wear out of the battery, but i clearly remember mine being at like 97-96% when i was at 44 or so cycles, waht am i doing wrong? is there a proper storage and use of the battery guide. I am aware of taking it out as soon as it is full and just keep laptop runing on the AC, but if i want to store my notebook for a while, like a week or two without using the battery, what percentage do i keep the battery charge at? IF you guys know some pages on a better usage of the batteryt hat would be actually great, all help appreciated!
  2. flopticalcube macrumors G4


    Sep 7, 2006
    In the velcro closure of America's Hat
    Why would you do that? Your MacBook will be running on half-speed if you do that. The battery cannot overcharge when the MacBook is on AC. Have you calibrated your battery recently?

    Calibrating your computer's battery for best performance

    Your MacBook has a Lithium-Ion battery, see here for charging info:

  3. sammich macrumors 601


    Sep 26, 2006
    Check out the site below, it will have answers to all your questions.


    Short answers: long term storage, reduce to 50% charge

    Nowadays you can leave the battery in when it's fully charged with the AC still in. There is no problem with that, it won't drain, but Apple does recommend you drain it every ~1 month. NOTE: all of the macbooks will not operate at full speed without the battery (without battery, all chips run at ~1 gigagertz afaik).
  4. Nuks macrumors 6502a

    Feb 25, 2006
    It's very battery dependent too. a 3 percent difference isn't that much at all, and there may be nothing that you did (or didn't do) to cause it.
  5. DoFoT9 macrumors P6


    Jun 11, 2007
    take the battery out if you want, i take mine out after charging it and put it back in the next morning fully charged ready for uni. a 5% difference in health isnt really going to be all that different.

    and by the way i hope you know that by taking out the battery your CPU will clock back to 1ghz.
  6. ref26 macrumors 6502a


    Mar 13, 2008
    Where is that information from? I can't find it on the Apple site. My blackbook shipped with a DOA battery and I'm waiting on a new one, so should I expect to see a speed boost once I get that in?
  7. flopticalcube macrumors G4


    Sep 7, 2006
    In the velcro closure of America's Hat
  8. joepunk macrumors 68030


    Aug 5, 2004
    a profane existence
    If you have the battery out when someone trips/pulls out your power cord, well I don't even want to think about what happens next.
  9. jag0009 macrumors newbie

    Jan 15, 2008
    From the above link
    "If the battery is removed from a MacBook or MacBook Pro, the computer will automatically reduce the processor speed. This prevents the computer from shutting down if it demands more power than the A/C adaptor alone can provide."

    This bugs the hell out of me. Why would the CPU speed be reduced when A/C is connected and battery removed??? I don't get this one. On most laptop the powersaving features (cpu speed as well) would get turned off when the unit is running of the A/C adaptor. Does that mean the A/C adaptor can blow up or get caught on fire????:confused:
  10. riscy macrumors 6502a


    Jan 4, 2008
    Good point, I never take the battery out, just run it on battery power every day or two and then recharge.


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