Macbook Pro battery

Discussion in 'MacBook Pro' started by r.kirkerrr, Apr 26, 2009.

  1. r.kirkerrr macrumors member

    Joined:
    Apr 17, 2009
    Location:
    Belfast
    #1
    i've had this mac for just under 3 years, and the battery for maybe two years (it was a recall for some reason).

    anyways, my problem is that the battery only lasts for 20 minutes. when fully charged it drains so quickly, not even using intense applications. i ran a few tests in coconut battery, and could only laugh at the results.

    18% of original capacity. which was 5500 mAh, now 1012 mAh.
    battery cycles - 586.
    Age of this mac - 24462 months!!!!!!

    what is going on here?
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    What does the battery info in system profiler say?

    It doesn't surprise me that your battery is drained that low- it's well beyond the expected 80%/300 cycles standard, but I am puzzled as to how your Mac predates the Roman Empire.
     
  3. clyde2801 macrumors 601

    clyde2801

    Joined:
    Mar 6, 2008
    Location:
    In the land of no hills and red dirt.
    #3
    Call apple to see if they'll cover the battery. If not, buy a new one. You can try sticking the old one in the freezer for a couple of days in a zip locked baggie, and charging it after it has thawed to see if that helps bring a little capacity back.

    I've heard that can help a bit.
     
  4. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #4
    Batteries are only covered for a year or 300 cycles/80%- whichever comes first.
     
  5. clyde2801 macrumors 601

    clyde2801

    Joined:
    Mar 6, 2008
    Location:
    In the land of no hills and red dirt.
    #5
    If you look under 'about this mac' is the serial number in roman numerals?
     
  6. angemon89 macrumors 68000

    angemon89

    Joined:
    Feb 5, 2008
    Location:
    The place where Apple designs stuff
    #6
    Hmmm, what exactly do you mean by that?

    Mine is at 154 Cycles
    80% health

    is that normal?
     
  7. iLog.Genius macrumors 601

    iLog.Genius

    Joined:
    Feb 24, 2009
    Location:
    Toronto, Ontario
    #7
    Nope. Try to calibrate your battery. If after calibrating the battery and it's still reading 80 percent health, battery needs to be replaced. Batteries have a lifespan meaning after a certain amount of usage, it will fail to hold a charge. So if you have charged your battery 300+ times the battery will be depleted.
     
  8. angemon89 macrumors 68000

    angemon89

    Joined:
    Feb 5, 2008
    Location:
    The place where Apple designs stuff
    #8
    Calibrating now.

    I did speak with Applecare a few minutes ago but they told me their "database" was down. I did however send him my system profiler information and he said my battery is right at the cusp of being either defective, or at normal. He told me to call back in a bit once their database is up an running again.

    I checked iStat again and now it's showing 78% but I guess I'll have to wait and see once it's calibrated.
     
  9. angemon89 macrumors 68000

    angemon89

    Joined:
    Feb 5, 2008
    Location:
    The place where Apple designs stuff
    #9
    Ok so it's calibrated now.

    I'm getting
    155 cycles
    77% health

    I called Applecare and they told me its within spec of normal usage.
     
  10. angemon89 macrumors 68000

    angemon89

    Joined:
    Feb 5, 2008
    Location:
    The place where Apple designs stuff
    #10
    Do you guys think it's worth it to try calling again and speaking with a different person to try and get my battery replacement? I still have Applecare btw.
     
  11. compuguy1088 macrumors 6502a

    compuguy1088

    Joined:
    Sep 3, 2007
    Location:
    In the Sub-Basement of Solitude
    #11
    Your not the only one that is having a MBP battery acting up....my battery life has been fluctating between 89%, 60%, and lower, even after attempting to calibrate the battery....:eek:

    [​IMG]
     

    Attached Files:

  12. SebZen macrumors 6502

    Joined:
    Apr 12, 2009
    #12
    How do you calibrate your battery? Or is that just something in this cocnut app so that it reads the battery more accurately?

    Also, just want to confirm if I'm ok or not. I just got a MBP. I found it has 7 cycles. If it's at 100 percent capacity and I start the computer, battery meter claims it has 3-3:30 hours (meaning it will last ~3 hours without actual use).

    If I watch a movie it claims it will last ~2 hours. Is this normal?

    15" UMBP. Using 9400M and a 7200RPM drive
     

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