New MBP - Is my battery ok?

Discussion in 'MacBook Pro' started by tbone-junction, Dec 20, 2010.

  1. tbone-junction macrumors newbie

    Dec 20, 2010
    I have a 3 week old 15" MBP 2.66 Core i7 4GB and after a full charge i've never shown more than 5 hours remaining on my battery status; shouldn't it be showing 8 - 9 hours remaining?

    I've followed the calibration steps outlined on the Apple site (full charge, leave plugged in for 2 hours then run down to empty, wait 5 hours and turn on to fully charge again) but i'm getting disapointing 'remaining battery' time readings. Here are my coconut stats:


    I have the screen at half brightness and have safari, mail and PS CS3 open, so internet browsing and some light editing in PS. I also see wild jumps from 5 hours, down to 3 hours, back up to 4 hours on the battery status, all within the space of 10 minutes.
  2. GGJstudios macrumors Westmere


    May 16, 2008
    This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ
    The time remaining is an ever-changing estimate, based on the current power demands of your MBP, which change as the workload on your Mac changes.
  3. alphaod macrumors Core


    Feb 9, 2008
    I've never gotten more than 5 hours of battery life and my battery health has never been higher than 97%.
  4. tbone-junction, Dec 20, 2010
    Last edited by a moderator: Dec 20, 2010

    tbone-junction thread starter macrumors newbie

    Dec 20, 2010
    thanks, I guess I was naive about real-world use being so different to advertised specs.

    that would annoy me

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