Battery capacity degrading 1% per cycle

Discussion in 'MacBook Pro' started by SecurityTinker, Jul 30, 2012.

  1. SecurityTinker macrumors newbie

    May 11, 2008
    I have a battery issue: starting from about two months ago, my battery has had its capacity decrease by 1% per cycle. I have no idea what it is doing this, as there has not been a change in my treatment of the battery. I go through at least once cycle per week. I have also tried "calibrating" as per the apple article. I have also reset the SMC. Nothing appears to change. What could be the issue?

    A summary of battery info is here. Note the right column.

  2. GGJstudios macrumors Westmere


    May 16, 2008
    Take it to Apple to have them check to see if your battery is defective. If it is and you have AppleCare, they'll replace it free.

    The built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries in older Apple notebooks.

    This should answer most, if not all, of your battery/charging questions:

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