Michael Byczkowski told: >http://lowendmac.com/pb2/powerbook-g4-400-500-mhz.html tells us that the >Ap Thank you Michael. However AFAICT, this battery is not on the motherboard (though it is connected to it) and is quite easy to exchange, if you know how take apart a titanium powerbook. Something I'd expect many on this list know how to. If not there are manuals, as have been suggested already.