Powerbook G4 Battery problems

Discussion in 'PowerPC Macs' started by evilworld84, May 9, 2017.

  1. evilworld84, May 9, 2017
    Last edited: May 9, 2017

    evilworld84 macrumors newbie

    Joined:
    Mar 10, 2015
    #1
    Hello,
    i'm repairing a Powerbook G4 Aluminium (PowerBook6,1 (12")) but i have problems with the battery
    Apparently the battery is ok, less than 400 cycles, but sometimes the laptop suddenly shutdown because the battery dies, even though seconds before the battery is at 90%.

    how's that possible? I don't have the officiale power adapter but a compatible one and i don't know why sometimes the battery charge and sometimes it doesn't, i don't know if it's the power adapter broken or the battery or both.

    Thanks for the help
     
  2. amagichnich macrumors regular

    amagichnich

    Joined:
    Feb 3, 2017
    Location:
    Stuttgart, Germany
    #2
    Buy a new battery and try it with that one. I hope that solves your problem. If not, things get a bit more complicated. Besides... 400 is quite much I think. My iBook has 86 loadcycles and only 65% of capacity left. Or maybe the controller in your battery is defect or manipulated
     
  3. Dronecatcher macrumors 68000

    Dronecatcher

    Joined:
    Jun 17, 2014
    Location:
    Lincolnshire, UK
    #3
    Is the battery an Apple one or aftermarket? Cheap aftermarket batteries can have quality control issues.
    Try removing battery and power plug and press the power button for ten seconds, reconnect battery and power plug and reset PRAM (hold down P, R,cmd and option keys til chimes three times). Then charge your battery to 100% and then use it til it dies - this will calibrate it as much as it can be and hopefully will then give you fair warning instead of just dying.
    After this, if problem remains it could be cell damage in the battery or a problem with the charging circuit.
     
  4. evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #4
    the battery is made by Apple, and my powerbook g4 doesn't have a PRAM
     
  5. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #5
    Your Powerbook has PRAM, all Macs have PRAM. What yours doesn't have is a PRAM battery. Resetting the PRAM and PMU are still good troubleshooting steps to take.
     
  6. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    Phoenix • 85037
    #6
    Then you do not have a PowerBook, you have an iBook G4. PowerBooks have PRAM batteries. iBooks do not.
     
  7. evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #7
    booting up the a holding down CMD+ALT+P+R didn't do anything, why?
    --- Post Merged, May 9, 2017 ---
    Powerbook G4 12'' Aluminium 867mhz doesn't have PRAM batteries.
    this is what i found on iFixit
     
  8. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    Phoenix • 85037
    #8
    When you use this keyboard combination you have to wait for the Mac to restart while holding down the keys until it does.

    Most people keep holding the keys down until the Mac has restarted two or three times.
     
  9. evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #9
    it doesn't restart at all
     
  10. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #10
    Shut off your PB
    Then, press and release the power button. Immediately press and hold the Option-Command-P-R
    Just for some attention to detail, be sure that your Option and Command are the left side keys, next to the space bar (Don't hold the CTRL key)
    You should hear the boot chime. Keep holding the same 4 keys until you hear the boot chime two more times.

    The battery on those older laptops has a suggested life of only 300 charge cycles, and an older laptop might even have an original battery that is miraculously clinging to life. 400 cycles would mean that it is living on the edge.
    It's not easy to find replacement batteries, but you could search for a replacement at one of the good Apple parts sites
     
  11. evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #11
    Nothing... it doesn't work ....
     
  12. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #12
    Does your PBook start up at all now? (No keys, just a normal boot.)
    If so, (again, no keys), do you hear a boot chime at all, ever?
     
  13. evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #13
    Yes it starts up normally and i hear the booting sound, but always just one, i've installed os x tiger, i don't know if this could cause any problems
     
  14. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #14
    You might have dead, or sticking keys on your keyboard.
    You can try the same reset with a USB keyboard, if you have one.

    And, you can test your keyboard by opening the International pref pane, then click Input Menu tab
    turn on the Keyboard Viewer by X-ing the box.
    Go to your menubar, and click on the flag icon, then choose Keyboard viewer.
    You will see a virtual keyboard on the screen, which matches your built-in keyboard. Press then release each key, which will repeat on the virtual keyboard.
    You will easily see any sticking (or dead) keys.
     
  15. evilworld84, May 9, 2017
    Last edited: May 9, 2017

    evilworld84 thread starter macrumors newbie

    Joined:
    Mar 10, 2015
    #15
    i've just tried the virtual keyboard, all the keys work except for the enter key
    I was using the powerbook without the power adapter connected and when the battery reached a certain point it died.
    and now the battery doesn't charge correctly, i had to insert the plug several times
     
  16. ApolloBoy macrumors 6502a

    ApolloBoy

    Joined:
    Apr 16, 2015
    Location:
    San Jose, CA
    #16
    It doesn't, the battery charges a capacitor that powers up the PRAM and if the battery runs completely dry, the PRAM gets erased. I fired up my 12" yesterday for the first time in a while and I had to reset the clock and wireless settings since the battery was totally dry.
     

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