battery is acting odd O_o

Discussion in 'MacBook Pro' started by krnjason, Aug 10, 2008.

  1. krnjason macrumors newbie

    Jun 1, 2008
    i just bought my mbp about a month ago and a couple weeks i noticed that when its pluged in from the power adapter, the battery would ALWAYS linger around 97-99% never 100 even tho its plugged in. and to reach 100, i would have to unplug and manually drain the battery a bit to fill it back up to 100.

    Now, when i plug it in its at 99% then when i unplug it, it miraculously goes back to 100% huh? this doesnt make sense to me. you think i should go to the apple store for a replacement battery?

    the warranties covers for 90days right? i dont have the apple care plan.
  2. EricNau Moderator emeritus


    Apr 27, 2005
    San Francisco, CA
    Make sure you've calibrated the battery.

    Also, your MBP is covered for parts and labor for one year, with 90 days of phone support.
  3. atluten macrumors 6502

    Mar 24, 2008
    The laptop discharges the battery a little even if the computer is plugged into an adaptor so it conditions the battery. It usually just lets the battery go down a few percent but charging the battery back up to 100% then letting it discharge back down again. This might explain what you're seeing.

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