Hi, I have a Powerbook G4 "15 PPC 1.67 GHZ. When I charge my battery, the light on the battery will blink as it would when it is charging. But after like 5 minutes it says it's full. Which is impossble. Then when I remove the charger, the computer says the battery is full. But after 3 min it shuts down because the battery is dead. I already resetted the PMU and the PRAM. But it didn't work. What can i do?