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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > Powerbook G4 won't charge past 43%?

Powerbook G4 won't charge past 43%?
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Fresh-Faced Recruit
Join Date: Feb 2005
Location: Houston
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Sep 15, 2009, 10:29 PM
I've got a Powerbook G4/1.5 12"

The battery life of my 280 cycle battery started acting weird, so I got a new battery.

Now, even the new battery won't charge past about 43%. I've repeatedly calibrated it, but to no avail.

Wanted to see if anyone had a solution.
Mac Enthusiast
Join Date: Nov 2000
Location: Palo Alto, CA USA
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Sep 18, 2009, 11:59 AM
Try using Coconutbattery. It will tell you the current charge capacity and how many cycles the battery has been charged. Maybe you got a bum battery and need to exchange it.
Join Date: May 2001
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Sep 18, 2009, 12:32 PM
You can reset the power manager. But given the age of your machine, I think the battery is just old. Batteries have a finite life time and ~300 charge cycles sounds reasonable.
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Mac Enthusiast
Join Date: Apr 2003
Location: Monterrey, Mexico
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Sep 18, 2009, 01:13 PM
Oreo, he´s got a new battery..
Junior Member
Join Date: Sep 2009
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Sep 18, 2009, 01:18 PM
would calibrating it in a different machine help at all?
Doc HM
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Join Date: Oct 2008
Location: UKland
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Sep 18, 2009, 02:50 PM
reset the Power Management on the G4 Powerbook.

Resetting PowerBook and iBook Power Management Unit (PMU)
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