http://www.macnn.com/articles/06/03/15/al.pb.battery.update.v11/
Apple posts PowerBook battery update
updated 09:00 am EST, Wed March 15, 2006
Al-PB Battery Update v1.1
Apple has posted a new Aluminum PowerBook (15-inch) Battery Update v1.1, which it says helps users get the most of out of their battery: "This battery firmware update is required for PowerBook G4 (15-inch Double-Layer SD) computers.... This firmware update is required to keep your battery life up to specification, may recover battery life in some batteries that have developed short run times, and in some cases can recover batteries that are not recognized by the system." The update is required for users who purchased replacement batteries after September 2005 and also for owners of the 'PowerBook 5,8' models, according to Apple's documentation.
