I don't remember seeing this anywhere but if it has been posted then apologies.
"Apple is voluntarily recalling certain lithium ion rechargeable batteries that were sold worldwide from January 2004 through August 2004 for use with 15-inch PowerBook G4 (Aluminum) notebook computers."
"The recalled batteries have the Model Number: A1045 and serial numbers that begin with: HQ404, HQ405, HQ406, HQ407, or HQ408."
"Some batteries were also sold separately during this period."
More info from