I know I did this before but I have a new -well 6 mnth old never put in the machine for use- just juiced it up battery for a 12 inch iBook about two months ago. I thought better be safe than sorry but now I am upgrading soon and this battery doesn't fit new machine.
It fits a white 700ghz  model and would be cheap at $40
if you are interested please ring
94448912
tom