These batteries are specifically designed and built for the apple powerbook g4 series G4 Series (Titanium) With a longer power lasting time and quick time to be fully charged, the battery gives you the best performance possible compared to original manufacturer standards for apple powerbook g4 series G4 Series (Titanium) Batteries; even it delivers 5% more power than the original apple powerbook g4 series G4 Series (Titanium) Battery.