What is wrong with my battery?

Discussion in 'MacBook Pro' started by kawixsiyu, Mar 10, 2010.

  1. kawixsiyu macrumors member

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    Feb 9, 2010
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    Ventura, CA
    #1
    My uMBP is 8 months old and has 33 cycles on the battery. Right now I am only using google chrome with 2 bars brightness and its telling me it will last for 2:17 min. Its currently at 93%. Bluetooth is off as well as the 9600m. Seems to me that it drains way too fast and charges way too slow. I did a full battery calibration last week and do them every couple months.
     
  2. GGJstudios macrumors Westmere

    GGJstudios

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    #2
  3. kawixsiyu thread starter macrumors member

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    #3
    I have timed it a couple times before and have gotten 2.5 hours at most with just internet browsing and no flash.
     
  4. GadgetGeek71 macrumors 6502

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    #4
    Any water damage? Humidity will reek havoc on your iPhone battery...sealed or not.
     
  5. kawixsiyu thread starter macrumors member

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    Feb 9, 2010
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    Ventura, CA
    #5
    I drained it to 0% and let it sit for 5 hours about 6 days ago. I will try resetting it with draining to 20%.
     
  6. GadgetGeek71 macrumors 6502

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    #6
    Sorry - I re-read your OP and edited my reply. Draining it to 0% is not a good idea. Although the batteries are not lead-acid, the ion lithium batteries will still dry and crystalize. The battery can over-heat and then you'll have REAL issues.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #7
    Just for clarity, draining a battery to 20% is not the same as calibrating. Also, draining a battery to 20% does not "reset" it.
    Draining a battery to 0% is part of the calibration process, and IS a good idea. Your information is inaccurate.
    Calibrating a portable computer battery
     
  8. GadgetGeek71 macrumors 6502

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    #8
    hmm...I heard different. I'm still a newbie at the iPhone thing...but I'm an electrical engineer who specializes in various types of batteries. not trying to B.S. anyone, just letting you know that I understand the working of batteries.

    My G1 battery resets at or around 20%.
     
  9. GGJstudios macrumors Westmere

    GGJstudios

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    #9
    This thread is not about iPhone batteries. It's about a MacBook Pro computer.
     
  10. GadgetGeek71 macrumors 6502

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  11. iLog.Genius macrumors 601

    iLog.Genius

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    Feb 24, 2009
    Location:
    Toronto, Ontario
    #11
    There's nothing wrong with your battery. If you have the removable battery, how long do you expect it to last? Theoretical time is 5 hours which is not going to happen. You should expect anywhere 3.5-4 hours. You might not be loading flash pages but internet browsing has a bigger load than say using Office or iLife. 2.5 hours with just web browsing I would say is within normal range.
     

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