Battery Question!

Discussion in 'MacBook Pro' started by julianewus, Sep 23, 2010.

  1. julianewus macrumors member

    Joined:
    Feb 26, 2008
    #1
    Okay I bought my Macbook Pro 13in the day they came out, and that means that I have had mine for a year and a few months, however I have 300 cycles and the battery only lasts for 2 and a half hours IF that. I have apple care which extended my warrantee.

    I find it hard that the battery life would degrade so rapidly just after 300 cycles under normal conditions.

    Is it covered by apple care to replace the battery?
     
  2. aeboi macrumors 65816

    aeboi

    Joined:
    Sep 20, 2009
    Location:
    Bay Area
    #2
    what's the battery health? and battery condition?
     
  3. julianewus thread starter macrumors member

    Joined:
    Feb 26, 2008
    #3
    the battery health is 95% I dont know how to check the "condition"
     
  4. alust2013 macrumors 601

    alust2013

    Joined:
    Feb 6, 2010
    Location:
    On the fence
    #4
    If your battery health is 95%, then you are doing something to run it down quickly (flash in web content, stray process sucking up CPU). I would check out activity monitor to see if there is something that is using a lot of CPU
     
  5. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #5
    System Profiler > Power > Battery

    Have you calibrated the battery yet?
    The built-in battery is able to last 1000 cycles, the user-replaceable battery is able to last 300 cycles.

    Apple on notebook batteries
    Apple Portable: Calibrating your computer's battery for best performance
    Laptop Battery Guide
    Replacing the Battery in your MacBook Pro

    Also have a look at Activity Monitor ( Applications / Utilities / ) and select All Processes and sort by CPU to see what the culprit may be.

    image below uses sorting by CPU as an example
    [​IMG]
     
  6. julianewus thread starter macrumors member

    Joined:
    Feb 26, 2008
    #6
    The only programs I use while not on ac are safari, and itunes, and skype (but I hardly ever video chat on skype)

    So I think that there is something wrong with the battery perhaps..
     
  7. julianewus thread starter macrumors member

    Joined:
    Feb 26, 2008
  8. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #8
    Safari can use Flash, Flash uses a lot of CPU in some instances, CPU uses power, the more CPU is used, the more power is needed.
    Thus my recommendation to use Activity Monitor.

    Btw, the battery health fluctuates a bit, I have a mid-2009 17" MBP and my battery health went from 99% on purchase to 94% during use and now is at 99% again, due to proper calibration.
     

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