Original Apple battery for all models of Titanium G4 PowerBook. This is a used, tested 14.4V battery, model number A1012 which is the later, higher capacity battery Apple supplied with the last Titanium PowerBooks. This battery has been fully charged, fully discharged and fully charged again before using Apple system profiler to determine the current capacity of the battery. This battery, when new, had a quoted capacity of 4,100mAh.