I found more batteries! I'd like to find homes for these as well.
One iBook g3 clamshell battery in great condition! Charges to 100% and lasts 1 hour and 20 minutes on a single charge, with the computer at 75% brightness and the hard drive constantly on. Tested and works great! $19 shipped!
I also have two iBook g3 Dual USB batteries. These both hold a charge, but not for very long. I think each one lasts less than 20 minutes, but I have not verified this. (I don't have a fully working dual USB ibook to extensivly test these batteries on) $14 shipped for both!
Take all three batteries for $30 shipped