If you've recently purchased a 15" PowerBook you might want to check the serial numbers on your batteries. Apple has launched a recall of certain ones due to a serious overheating risk:
https://depot.info.apple.com/batteryexchange/index.html --- Rex. | The next meeting of the Louisville Computer Society will | be August 24. The LCS Web page is <http://www.kymac.org>. | List posting address: <mailto:macgroup at erdos.math.louisville.edu> | List Web page: <http://erdos.math.louisville.edu/macgroup>