Dave, for a robot with a pair of Bosch 750s and a current limited roboteq controller you could get away with 9Ah of cells, (3 x 3Ah packs). That would just about serve you for a fight - if you want some contingency Id look at 4 x 3Ah packs.

If youre after some cells, we have around 120 C-size Sanyo N3000CR cells which are up for sale. Email me an offer Dave - email address on profile.

Ed
http://www.teamstorm.com
http://www.teamstorm.com