> Can I use my extra battery which I bought for my 12" 500mhz dual USB G3 > ibook on a new 12" g4 ibook ??? Does anybody know ??? I checked > apple.com > but could not find anything > I myself am in the same situation. Electronically, they are very similar in voltage and the ibook one has some more amps but there is no reason why it wouldn't work otherwise.Unfortunately, they do not fit physically. I have tried. I do have the 12" 867 model, maybe the new 1Ghz's are different? I Doubt it but its worth an shot. thanks, Ian