Apple has announced a product recall of batteries used in various models of it's portable line sold between October 2004 and May 2005. According to the recall, an internal electrical short can occur in the battery cells causing it to overheat, posing a fire threat. The models affected are:
12-inch iBook G4 A1061 HQ441 HQ507
12-inch PowerBook G4 A1079 3X446 3X510
15-inch PowerBook G4 A1078 3X446 3X509
Powerbook batteries have previously been subject to recall in August of 2004.