Battery Life for 2012 15" rMBP

Discussion in 'MacBook Pro' started by cherishzm, Jul 11, 2014.

  1. cherishzm macrumors regular

    Mar 13, 2011
    I've had a 2012 15" rMBP (2.3GHz/16GB) for about two years now and I'm happy with almost everything about it except for what I consider a poor battery life. My battery status shows 437 cycles with 91% health and it lasts about 3 hours or less with using the HD4000 graphics card at about 65~70% brightness. I don't watch movies or doing anything heavy but web browsing and Excel work mostly. Is this normal?

    I use it as my main work/home computer and have it connected to a power and external display at work and use it at home with a battery mostly for 1~2 hours and sometimes I had to go to my workplace to grab a adapter because the battery ran out quicker than normal while doing some important things. I

    Is there a way to get a little longer battery life? I usually have Bluetooth turned off at home. Reducing screen brightness to less than 60-65% is little uncomfortable for me... I don't know how the current 15" could last up to 8 hours!
  2. rapicell macrumors regular

    Mar 20, 2013
    Well, you have to factor in the retina screen takes a lot to power it
  3. MagicBoy macrumors 68040


    May 28, 2006
    Manchester, UK
    It's the high brightness that's using the battery.

    I just tried 65%, it's hurting my eyes! Going back to 4 blobs...

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