How To Calibrate a Mac Laptop's Power System - NewerTech
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PowerBook G4 battery is dead. How do I go about fixing that? : r/VintageApple
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Battery for APPLE POWERBOOK G4 17 "G4 17-Inch/A1039 A1057 M9326, 10,8 V, Li-Ion: Amazon.co.uk: Computers & Accessories
How To Calibrate a Mac Laptop's Power System - NewerTech
Making a damaged PowerBook G4 work on battery | Overclock.net
My 2001 PowerBook G4 (Gigabit Ethernet) is still going strong (the battery however is dead :-( ) : r/VintageApple
$25 dollar ebay 2001 PowerBook G4 Titanium. Advertised as not powering on, reset the pram battery and it's good as new. No chipping and hinge damage. Near mint condition. : r/VintageApple
NewerTech® : Batteries : PRAM Battery for PowerBook® G4 17-inch Aluminum 1.5GHz – 1.67GHz Systems