Battery For US

Apple Powerbook G4 battery
As far as I know there are three style 3 Apple PowerBook G4 Battery, I also confuse them for a long time. I dont understand why apple named its macbook as powerbook G4 12-inch, 15-inch, 17-ich, titanium and aluminum? I also dont know why not apple name it as dell inspiron 6000, [...]

Improving apple notebook by calibrating your battery
You can calibrate your iBook, PowerBook, MacBook, MacBook Air, or MacBook Pro computer’s lithium ion battery for best performance.
The laptop battery has an internal microprocessor that provides an estimate of the amount of energy in the battery as it charges and discharges. The a1175 battery needs to be recalibrated [...]