Help: 13" MBP Sleep battery life has gone south

Discussion in 'MacBook Pro' started by ZZ Bottom, Jan 15, 2012.

  1. ZZ Bottom macrumors 6502a

    Apr 14, 2010
    Seeking advice on tracking down the cause of my recent drop in battery life while my MBP is sleeping. My sleep battery decrease used to hang at around a ~10% reduction over night. Now in the last week or so I am losing 20-30% during same time. I have performed a full 100% to 0% to calibrate the battery 3 days ago, but it doesn't appear to have corrected.

    -Bought new in early November. Current cycle count is 38, condition: "normal"
    -Has 60GB Mushkin SSD in primary sata, oem drive in secondary. SSD has 13.5GB free.
    -At most two safari windows open while in sleep, no other apps running.
    -Only recent app installed is "Boom" to boost audio volumes. But I can't find any other complaints about boom causing any problems

    Could anyone point me in the right direction of what I may do to help figure out the sudden reduction in battery performance?

    PS battery life while the system is running appears completely normal based on last threes months.
  2. GGJstudios, Jan 15, 2012
    Last edited: Jan 15, 2012

    GGJstudios macrumors Westmere


    May 16, 2008
    It's probable that your MBP didn't stay in sleep mode the whole time:
    First, that's not how you calibrate a battery. Second, calibration doesn't affect power consumption in sleep mode. It only makes your battery readings more accurate. Finally, the built-in batteries in the newer Mac unibody notebooks come pre-calibrated and do not require regular calibration like the removable batteries.

    This should answer most, if not all, of your battery questions:
  3. chillfrilla macrumors member

    Dec 30, 2011
    its fine th e battery indicator can sometimes dsplya inaccurate reports

    so turn it off and USE YOUR COMPUTER

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