Battery Issues

Discussion in 'MacBook Pro' started by Eatsleepdrivesc, Sep 21, 2012.

  1. Eatsleepdrivesc macrumors member

    Aug 30, 2010
    Hey guys,

    I have a Mid 2009 17" MBP, 2.8 Duo, 8 Gig of ram, on better battery life. ( Using the 9400M not the 9600M GT graphics card )

    And here is the stats of my battery. It was replaced once under Applecare about a year ago because it had a Service Battery issue.

    My fully charged capacity used to be around 12500 to 13000, now its at 10623.

    I have attached a picture of my system info.

    I had it today at 2nd away from minimum brightness, no backlit keyboard on, and just wifi, at 90% and it had 2 hours and 30 minutes on battery, and it lasted only 2 hours and 11 minutes.

    I was only using safari and surfing the net, no flash whatsoever and on activity monitor i was never over 20% cpu usage.

    I went to the MacRumors guide and calibrated it ( even though it says the built in ones dont have to, but I felt as if I should ) and it hasn't got any better. (Fully charged it and left it charged for the 2 hours, Ran it down to where it turned off, left it unplugged with no battery for 7 hours, and then plugged it in and gave it a full charge. )

    Any ideas, or should I bring it on in? Does it even qualify for a replacement? I have Applecare on it for another 3 months.


    Attached Files:

  2. Dark Void macrumors 68030

    Dark Void

    Jun 1, 2011
    It probably won't qualify for a replacement, seems fine. Calibration would not increase the battery's performance, it would only provide more accurate estimates.

    It does not seem defective in any right. 2 hours does seem low but it all depends on what you doing, and switchable graphics may be affecting its actual performance.

Share This Page