Looks like modelsport are doing the spares at a good price.
I couldn't wait for my new batteries so decided to split a 2s zippy flightmax used for my micro rally, and put new mini jst connectors on.
This gives me 2 350mah batts cheeper than any other source. I recon the battery could be slightly longer and still fit.
Any other batts people have tried apart from the nanotech and shark ones?
Love this little thing.