8 Replies Latest reply: Nov 7, 2012 6:38 AM by woofmatix
woofmatix Level 1 (0 points)

Hi folks!


I noticed that even though my battery is fully charged it only gives me about 4 hours of battery life sometimes. I have a MacBook Pro early 2011 i3 13". Some days I'm able to go up to 6 hours but  sometimes it goes down to 4.5 hours even withou any applications running. I occasionally calibrate my battery as well but I'm wondering why. I remember the power disconnecting for a second before this happened. So maybe if I run the battery down fully and charge it again it should give a the proper readings again or a recalibration is necessary? Btw, my battery have just about 150 cycles on it..

Logic Pro, Mac OS X (10.6.8)
  • Bimmer 7 Series Level 6 (10,275 points)

    You will never get the exact time on how your battery will last.


    Since you have a 2011 Macbook Pro - do not even attempt to Calibrate your battery (unless you want to mess up your Macbook and your battery).


    Normal usage is to keep your Macbook plugged in when close to a power outlet.


    Once in a while, use it under it's own power and charge it back up once you're down to 75% to keep your battery in optimal condition.


    Using your Macbook until the battery fully discharge may do more harm than good to your Macbook - search this forum and you'll see people having issues with their Macbook after they've let their battery rundown all the way to 0%.


    From Apple's website.


    Portables with built-in batteries

    Current Apple portable computer batteries are pre-calibrated and do not require the calibration procedure outlined in this article. These computers use batteries that should be replaced only by an Apple Authorized Service Provider.

  • woofmatix Level 1 (0 points)

    Thanks! I do use it on battery power one in a while just to keep the battery running.. Just that I'm wondering why the reading is so inaccurate. It's about 2 hours!

  • Bimmer 7 Series Level 6 (10,275 points)

    Have a look at mine - see image.....


    Like yourself - the difference is 2 hours.....But I'm happy to get 7 hours out of mine...


    Battery Life.png

  • woofmatix Level 1 (0 points)

    Lol yeah but I'm getting 2 hours the other way about... 4 hours!

  • Bimmer 7 Series Level 6 (10,275 points)

    try this:


    system preferences - users and groups - login items - if you see any apps there and you don't need it, delete them....


    turn your bluetooth off if you're not using it.


    turn off automatic brightness


    turn off infrared remote receiver if you're not using an apple remote.


    keep your brightness at 50%


    open activity monitor - under all processes - see what's using around 10% in the %CPU section.


    if you don't need it highlight it and hit quit process...


    doing the above might increase the life of your battery to 5+ hours..

  • woofmatix Level 1 (0 points)

    Thanks a lot! I had my brightness upto about 70%.. I guess maybe that's why I was getting just about 6 hours anyway. Maybe now I should get about 7 hours. It just didn't strike me! Thanks!

  • Bimmer 7 Series Level 6 (10,275 points)

    You're welcome - hope you can get at least 5 or 6 hours of use on a single charge....remember, don't let your battery drop down to less than 10% if you plan on testing how long a single charge can last you.


    good luck...

  • woofmatix Level 1 (0 points)

    Ok... I know this is coming after sometime... I've noticed a weird thing... When I startup my computer I have "Stickies" and "Opus Domini Lite" start up... I also have Sophos installed so it runs in the background... The battery indicator says 4-5 hours when no programs other than these are open and when I open my browser, which is Chrome, the indicator goes from 6-7 hours... I find this strange... Any idea why this might be occuring?