One of the details of consideration that make a difference
would be the size of the Display; as the computer with a
14" LCD generally also has a faster processor than the
same model year build in a 12" display. Also the 14"
model is more likely to have a SuperDrive, not a Combo.
•14" ibook model ^
•12" ibook model ^
Notice there are white iBook G3 computers, also white G4.
The replacements listed at site linked below will work.
So when looking into a site such as this, be sure to check
the correct one (and display size) to check for a match:
http://eshop.macsales.com/shop/Apple/Laptop/Batteries
The number of cells would only matter if you were into
taking them apart & rebuilding them. Not buying retail.
Good luck & happy computing! 🙂