Macbook Pro (Late 2009) 13'' Battery Issues

Discussion in 'MacBook Pro' started by sick z33, Jul 18, 2011.

  1. sick z33 macrumors 6502

    Joined:
    Sep 20, 2008
    #1
    My battery is only lasting 2 hours at the most on a full charge. My battery cycle count is at 140, And I try to cycle the battery at least 1-2 times monthly. The condition reads normal. I am using dim brightness on monitor, with no bluetooth enabled. Only casual internet browsing, and checking email. I used to be able to leave my Macbook on coffee table and use it for 1-2 hours a day and it would last the whole week by just putting it to sleep in between those times I use it.

    Anyone have recommendations? I'm pretty sure its a faulty battery, but it seems like it would be too soon to already have to replace the battery. Based on the cycle count and battery health as "normal", would this be covered under Applecare?
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Make sure your battery is properly calibrated. This should answer most, if not all, of your battery questions:
     
  3. sick z33 thread starter macrumors 6502

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    Sep 20, 2008
    #3
    Thanks for the info! I forgot to mention that I have already properly calibrated the battery. :(
     
  4. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #4
    Read the FAQ, especially the BATTERY LIFE FROM A CHARGE section. Also, do you have Parallels installed?
     
  5. sick z33 thread starter macrumors 6502

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    Sep 20, 2008
    #5
    Thanks :) I'm reading up on the information now. And yes I do have Parallels installed, although I hardly use it anymore. Could that be an issue?
     
  6. Maxpilot macrumors member

    Joined:
    Jun 24, 2009
    Location:
    Midwest
    #6
    www.batteryuniversity.com is a good read. They recommend:

    Do not discharge Li-ion too low; charge more often.

    A random or partial charge is fine. Li-ion does not need a full charge.

    High heat and full state-of-charge, not cycling, cause short battery life in laptops.

    I think everyone calibrates too often. Once every quarter is fine. Discharging a Li-Ion battery completely is bad for the battery in the long run.

    Use your MacBook on battery a little every day and it will last a long time.
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Mac Dock consuming 100% of CPU core after upgrade to Mac OS X 10.6.8
    It's a good read, but it's generic and isn't as relevant as the information Apple provides on the specific battery technology they use. It's better to follow Apple's recommendations since Apple, not batteryuniversity.com, is liable to replace batteries that are faulty.
     
  8. Maxpilot macrumors member

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    Jun 24, 2009
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    Midwest
    #8
    Actually it's the other way around. Apple is providing basic generic guidance on how to charge and maintain the batteries used in their products. I don't see any contradictions to what Batteryuniversity and Apple are saying.

    I do have a problem with you telling everyone to calibrate their battery every time it falls short of Apple's stated times. Calibrating does nothing to make a battery last longer. Calibrating only adjusts the digital fuel gauge. Deep discharging a Li-Ion battery will cause more harm than good (little by little).
     
  9. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    No, batteryuniversity info applies to lithium ion batteries in general. They do not have specific information about the lithium polymer batteries used in Apple notebooks. Apple's specific application of charging technology, the batteries and the MagSafe adapters, is not generic and is not discussed on batteryuniversity.com.
    Calibrating doesn't make a battery last longer. It makes the readings more accurate. That's clearly stated in the Battery FAQ, which you would do well to read instead of batteryuniversity.com. Most people look at the estimated time remaining or their battery health as indicated and freak out, thinking their battery life is much less. Calibration is a first step to make sure their readings are as accurate as possible. Do yourself a favor and read the Battery FAQ, so you have the whole story.
     
  10. -aggie- macrumors P6

    -aggie-

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    Where bunnies are welcome.
    #10
    He states that in his FAQ.
     
  11. Maxpilot macrumors member

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    Jun 24, 2009
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    Midwest
    #11
    I don't know why you are getting all defensive about this.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    I'm not defensive at all. Calibration isn't a one-time event. That's clear, since Apple recommends calibration every month or two. Pre-calibrated models don't need the initial or regular calibration, but if a user suspects readings may be inaccurate, calibration is quite appropriate. I didn't recommend calibration as the only step. I referred them to the Battery FAQ, which gives a lot more information about their issue.
     
  13. sick z33 thread starter macrumors 6502

    Joined:
    Sep 20, 2008
    #13
    Thanks for all the help GGJstudios. I went ahead and got rid of Parallels since I hardly used it anymore. I also installed ClicktoPlugin and doing a calibration now.

    Battery Health currently shows as 87% on iStat.
     

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