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  1. #1


    Member Since
    Oct 19, 2010
    Posts
    5
    new battery chargest to 81% (cocount), then powerbook goes to reserve power in <10min
    I bought a new battery since my old one was toast. 12" powerbook G4 10.5.8
    According to coconut, 2 cycles on new battery, and capacity matches up correctly. It only charges to 81% power according to coconut battery. When running on battery, after about 10 min the powerbook power meter drops off down to nothing, and I get the warning about reserve power. A couple minutes later it goes to sleep.

    I've reset the PMU, and the SMC ( I think that's what its called). It didn't do anything. The computer fan also runs on full speed all the time (another thread....temp sensors read everything ok).

    Any ideas? This "new" battery is about as effective as the old battery. Is there some other memory in the computer that needs to be reset?


    Battery Information:

    Charge Information:
    Charge remaining (mAh): 3307
    Charging: Yes
    Full charge capacity (mAh): 4400
    Health Information:
    Cycle count: 2
    Condition: Good
    Battery Installed: Yes
    Amperage (mA): 686
    Voltage (mV): 12573

    System Power Settings:

    AC Power:
    System Sleep Timer (Minutes): 10
    Disk Sleep Timer (Minutes): 10
    Display Sleep Timer (Minutes): 5
    Dynamic Power Step: Yes
    Reduce Processor Speed: No
    Automatic Restart On Power Loss: No
    Wake On AC Change: No
    Wake On Clamshell Open: Yes
    Wake On LAN: Yes
    Wake On Modem Ring: Yes
    Display Sleep Uses Dim: Yes
    Battery Power:
    System Sleep Timer (Minutes): 5
    Disk Sleep Timer (Minutes): 10
    Display Sleep Timer (Minutes): 1
    Dynamic Power Step: Yes
    Reduce Processor Speed: No
    Automatic Restart On Power Loss: No
    Wake On AC Change: No
    Wake On Clamshell Open: Yes
    Wake On Modem Ring: No
    Display Sleep Uses Dim: Yes
    Reduce Brightness: Yes

    Hardware Configuration:

    Clamshell Closed: No
    UPS Installed: No

    AC Charger Information:

    AC Charger (Watts): 65
    Connected: Yes
    Charging: Yes

  2. #2


    Member Since
    Oct 19, 2010
    Posts
    5
    I encountered this when trying to do the 2-3 cycle break in.

  3. #3


    Member Since
    Mar 30, 2004
    Location
    USA
    Posts
    4,744
    Specs:
    12" Apple PowerBook G4 (1.5GHz)
    Where did you get this battery from? Return it and try a new one.

  4. #4


    Member Since
    Oct 19, 2010
    Posts
    5
    laptopbatteryone.com

  5. #5


    Member Since
    Mar 30, 2004
    Location
    USA
    Posts
    4,744
    Specs:
    12" Apple PowerBook G4 (1.5GHz)
    That site seems to sell half-price knockoffs. You'll probably have better luck with an actual Apple battery.

  6. #6


    Member Since
    Oct 19, 2010
    Posts
    5
    what's the difference between a knockoff and a generic? The generic battery I have for my sony camcorder works great, for instance.

  7. #7


    Member Since
    Feb 05, 2009
    Location
    Seattle
    Posts
    51
    Specs:
    MBPro15 2.4/4/500 (Mid 09), MBAir13 2.13/4/256 (Late 10)
    LiIon batteries also have a finite shelf-life if left sitting without being cycled at all. thus it could be authentic but just really, really old... much like the machine you're using it in.

  8. #8

    WolfsBane's Avatar
    Member Since
    Dec 21, 2007
    Location
    Treasure Valley, Idaho. US
    Posts
    406
    Specs:
    20" iMac 2.4GHz w/ WD My Book 500GB HDD. MacBook Pro 2.4GHz. iPhone 5, white, 16 Gigs.
    Also, remember that you may need to calibrate your battery meter with the new battery. The Apple support site has information on how to do this.

    Hope Springs Eternal
    Welcome... to the house of Rock and Jazz!

  9. #9


    Member Since
    Mar 30, 2004
    Location
    USA
    Posts
    4,744
    Specs:
    12" Apple PowerBook G4 (1.5GHz)
    Quote Originally Posted by puck1263 View Post
    what's the difference between a knockoff and a generic? The generic battery I have for my sony camcorder works great, for instance.
    Well, if you're happy with that battery, by all means stick with it.

    I just thought...from the thread...your...oh, nevermind.

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