I had the same problem on one of my PB180's. I saved the dead battery in case I get around to replacing the cells in it. I took the cover off the dead battery so the powerbook would look complete, and not have the big hole showing on the side from the missing battery. The ac adapter works well and you can use the same adapter in the car with the aftermarket ac to 12v adapter plugged into the lighter socket. I picked up one of those on sale for $9.00. Works with any laptop that draws less than 100w's