MacBook Pro battery failing

Discussion in 'MacBook Pro' started by mrblu, Jul 14, 2008.

  1. mrblu macrumors newbie

    Joined:
    Sep 19, 2007
    #1
    After several times of my MBP shutting down without warning, and while the battery indicates a charge of 83-85%, I did some checking.

    Here is what the computer says:

    Battery Information:

    Model Information:
    Serial Number: Sony-ASMB012-3734-9d57
    Manufacturer: Sony
    Device name: ASMB012
    Pack Lot Code: 0003
    PCB Lot Code: 0000
    Firmware Version: 102a
    Hardware Revision: 0500
    Cell Revision: 0303
    Charge Information:
    Charge remaining (mAh): 3966
    Fully charged: No
    Charging: Yes
    Full charge capacity (mAh): 4699
    Health Information:
    Cycle count: 63
    Condition: Good
    Battery Installed: Yes
    Amperage (mA): 1501
    Voltage (mV): 12421

    Coconut confirms these figures.

    I tested it this way: when the battery indicator reads 99%, the mag safe light turns green. The battery icon says fully charged. I unplug the mag safe, and continue surfing. After about twenty minutes the computer shuts off - NO warning. Just before it dies, the battery meter says 83-85% charge remaining.

    So basically, I can only use about 15% of the battery's capacity.

    My usage is mixed - I'll have it plugged in for several hours a day, but also use it un-plugged to 'exercise' the battery.

    I've tried to calibrate it but when it shuts off at an indicated 83-85%, its hard to 'drain' the battery.

    Any suggestions before I try to get this battery replaced?

    TIA!
     
  2. davegoody macrumors 6502

    davegoody

    Joined:
    Apr 9, 2003
    Location:
    Reading, Berkshire, England
    #2
    Incredible !

    I have EXACTLY the same problem with my MacBook Pro 17" - 2.33Ghz

    It DOES restart though, on battery, when the power button is pressed (cold start) - and then runs OK 'til the end.

    I will get mine swapped out under AppleCare, if yours is under warranty still I would do the same.

    Dave
     

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