Sleep mode problem/ battery problem

Discussion in 'macOS' started by archmac23, Oct 19, 2008.

  1. archmac23 macrumors newbie

    Oct 19, 2008
    i just bought a new battery and instead of my computer automatically going into sleep mode when my battery runs low it runs all the way out until my mac shuts down. is there any way to make to computer sleep when my battery runs below a certain percent? i tried making some changes in system prefs but didn't have any luck.

    also is it bad for the battery to leave it plugged in after it is fully charged? whats a normal battery life supposed to be? mine doesn't last much longer than an hour

  2. richard.mac macrumors 603


    Feb 2, 2007
    51.50024, -0.12662
    leaving the battery plugged in while its fully charged is fine. the battery trickle charges down to 90% then back up to 100% to keep its electrons moving. do a battery calibration once a month to keep your battery healthy.
  3. misterredman macrumors 6502a


    Oct 3, 2007
    You really need to calibrate your battery. Follow the procedure described here:

    Your mac need the calibration to become aware of the capacity of the new battery.

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