Is it time to replace my MacBook (Black) battery?

Discussion in 'MacBook' started by applemax, Jul 8, 2009.

  1. applemax macrumors 65816

    applemax

    Joined:
    Feb 22, 2005
    #1
    Hi

    I've been having some issues with my battery lately :(

    Sometimes, the computer just goes to sleep/shuts down at 30% and the battery drains in around 1-2 hours.

    However, after a calibration, everything seems OK.

    However, I've already bought a replacement, it's still sealed, and the return date is tomorrow.

    So. Open it or send it back? :)

    I've got 354 cycles, maximum 3203mAh (out of 5020mAh), i.e. 63% health, and battery age is 30 months.

    I just read the Apple website and it says 'up to 5 hours' under certain conditions. In the small print, those 'conditions' are:

    wirelessly browsing various websites and editing text in a word processing document with display brightness set to 50%.

    I did a test - left the laptop running, pretty much idle, screen left on at 50%, with sleep turned off in energy saver, with real-time updating websites on the screen. It lasted from a 100% charge for 1 hour 54 mins.

    So, would you advise opening the pack ...or sending it back? :D

    Cheers :apple:
     
  2. iLog.Genius macrumors 601

    iLog.Genius

    Joined:
    Feb 24, 2009
    Location:
    Toronto, Ontario
    #2
    At 354 cycles, your battery is at it's end of life according to Apple who says typical battery life/usage up to 300 cycles. So you would be needing a new battery anyway so you're going to want to keep it rather than returning.
     
  3. applemax thread starter macrumors 65816

    applemax

    Joined:
    Feb 22, 2005
    #3
    Thanks. What does everyone else think? :)
     
  4. sumzitup macrumors newbie

    Joined:
    Jun 17, 2009
    Location:
    New Zealand
  5. Wie Gehts macrumors 6502

    Joined:
    Mar 22, 2007
    #5
    how do you find out how many cycles your battery has and stuff?

    i've had my macbook nearly two years. i think i've done a calibration only 3 times. but after about a year in i notice when i recharge, the level will show 100% then a day or so after with the power attached, it'll read 99 or 98% with a green light.

    edit..found it in the system profiler 254 cycles
     
  6. applemax thread starter macrumors 65816

    applemax

    Joined:
    Feb 22, 2005
    #6
    The reason it shows 99% or 98% is so it doesn't waste part of a cycle. So, it doesn't charge until it drops below around 93%.
     

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