My battery lost 17% capacity in one charge!?

Discussion in 'MacBook Pro' started by iSpoody 1243, May 23, 2010.

  1. iSpoody 1243 macrumors 6502

    Joined:
    Jun 29, 2008
    Location:
    Australia
    #1
    hey,
    I have owned an early 08 mbp for a little over 1.5 years and the battery health is already at 67%.
    yesterday the battery health was at 84%. i just decided to calibrate the battery so i drained the battery until it went to sleep then left it in sleep overnight till it shut down. After that i let it charge till the light went green and to my surprise found that the battery health dropped quite a bit.
    so what does this mean? is this 'normal', or is my battery on its last limb?
     

    Attached Files:

  2. greemie macrumors member

    Joined:
    May 23, 2010
    Location:
    Unitied States
    #2
    I believe the macbook battery is good for about 300 cycles. You can check your cycles in system profile - power.
     
  3. designgeek macrumors 65816

    designgeek

    Joined:
    Jan 30, 2009
    Location:
    "Town"
    #3
    [​IMG]

    If it keeps dropping then call Apple Care immediately. Mine has been dropping slowly since about 500 cycles and it's currently at 94% on 866 cycles and it's about 19 months old says coconut battery. That kind of drop is not normal though.
     
  4. iSpoody 1243 thread starter macrumors 6502

    Joined:
    Jun 29, 2008
    Location:
    Australia
    #4
    well i'm only at 65 cycles!
    well i guess ill calibrate my battery again to see what happens.
    if the battery continues to drop what should i do?
    is there anything apple could do?
    thanks
     
  5. scaredpoet macrumors 604

    scaredpoet

    Joined:
    Apr 6, 2007
    #5
    If it's under Applecare, Apple will replace the battery. And even if you're not under Applecare, it shouldn't hurt to set up a genius appointment and see if they'll swap it anyway.
     
  6. iSpoody 1243 thread starter macrumors 6502

    Joined:
    Jun 29, 2008
    Location:
    Australia
    #6
    yeah my mbp is under apple care till end of 2011.
    the nearest apple store is 2 hours away, not exactly a leisurely drive.
    what would calling them accomplish, prob just tell me to bring it into the store.
     
  7. Gorilla Power macrumors 6502

    Gorilla Power

    Joined:
    Mar 19, 2010
    #7
    I'm pretty sure its just a wrong reading since technically its not possible for a good battery to just drop like that in one cycle. Recalibrating it might help.
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #8
    Try following the calibration steps exactly and see if you get different results.
     
  9. scaredpoet macrumors 604

    scaredpoet

    Joined:
    Apr 6, 2007
    #9
    Actually, they shouldn't tell you to come to the store. I once called Apple directly for an MBP (late '06 model) with a failing battery like yours. They had me check a few things (like battery life and health readings) in System Profiler. Then they shipped me a new one, and I shipped the old one back in the same container, and the problem was solved. Even though there are a couple Apple stores within 30 minutes drive of where I live and work.

    Since youve got an early '08 model, the battery is still removable, so they should be able to do the same for you.
     
  10. designgeek macrumors 65816

    designgeek

    Joined:
    Jan 30, 2009
    Location:
    "Town"
    #10
    Yup, all you have to do is call them and they should ship you a new one. At the very worst you'll have to put down a deposit.
     
  11. dsprimal macrumors 6502a

    dsprimal

    Joined:
    Mar 27, 2010
    #11
    so much for the expected 1000 recharge cycles that apple said :rolleyes:
     
  12. snaky69 macrumors 603

    Joined:
    Mar 14, 2008
    #12
    Those are for the integrated batteries, this one isn't one.

    To the OP, your battery most likely died from lack of use. 65 cycles in 2 years isn't all that much.
     
  13. ExcelonGT macrumors regular

    Joined:
    Feb 9, 2008
    #13
    Are you joking? i checked system profiler and do not see any cycle limit listed. My other machine, a macbook air has over 500 cycles on it and the battery health is at 97%


    Battery Information:

    Model Information:
    Serial Number: W0014PC8VBX0A
    Manufacturer: SMP
    Device name: bq20z451
    Pack Lot Code: 0000
    PCB Lot Code: 0000
    Firmware Version: 0201
    Hardware Revision: 000a
    Cell Revision: 0157
    Charge Information:
    Charge remaining (mAh): 2315
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 6790
    Health Information:
    Cycle count: 26
    Condition: Normal
    Battery Installed: Yes
    Amperage (mA): -2031
    Voltage (mV): 11044
     
  14. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #14
    Read "Battery Lifespan" at the bottom of this page to find the expected lifespan for your model.
     
  15. iSpoody 1243 thread starter macrumors 6502

    Joined:
    Jun 29, 2008
    Location:
    Australia
    #15
    I checked that page and it said my battery shouldn't go under 80% until it has had 300 discharges.
    i just calibrated the battery exactly like the link said and my battery health is now at 69% at 66 load-cycles.
    I'm gonna call apple care now and see what they say.
    thanks for your help!

    applecare said my battery is defective, i need to take it to a service center and have it tested then if the test finds it to be defective i will get a new one.
     
  16. greemie macrumors member

    Joined:
    May 23, 2010
    Location:
    Unitied States
    #16
    It says Cycle count: 26
    But all macbooks are different. From early 08, I believe the magic number to be 300. Verified by Apple.com
     
  17. djasterix macrumors 6502a

    djasterix

    Joined:
    Apr 10, 2010
    Location:
    Paradise City
    #17
    That's not normal, call Apple and get it replaced.
     
  18. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #18
    Did you read the thread? The OP said they already got it replaced.
     
  19. ExcelonGT macrumors regular

    Joined:
    Feb 9, 2008
    #19

    That's 26 completed cycles so far. Nothingto do with battery cycle limits
     

Share This Page