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PRAM Battery For PowerBook G4 Aluminum 1.67GHz or PowerBook G4 1.67GHz "Double Layer SuperDrive"
Is your PowerBook G4 17" 1.67GHz or PowerBook G4 1.67GHz "Double Layer SuperDrive" forgetting what time and day it is?
Your clock battery is failing! Time to replace it!
Apple Replacement Part Number: 922-6763