New bigger capacity battery same size as original?

Hey,
I was looking for a bigger capacity battery and was curious as to whether or not anyone knew of any that were of the same dimensions as the original (because I like the size of the AAO as is)

any suggestions would be great.
just remember I would like it to be higher capacity but of the same size (if it is possible yet)

thanks

 

I'd like a Ferrari I can move furniture with, it just aint gonna happen.

But seriously, to keep the form factor you can't add cells, so all you could do is raise the capacity of the 3 cell. I haven't seen anyone release a higher capacity 3 cell yet, but even if they did up the mAH, with current technology you could only probably squeeze 3-4 hours out of a 3 cell.