2old

Pretty sure that you need 10s X 4p, that is 10 batteries in series (positive of one to negative of next, but each cell is 4.1 or so and you would have 41V or so), then 4 "rows" in parallel (positive to positive and negative to negative) to get 10 amps. Therefore 40 say 18650 cells for most Lithium cells (at about $7.00 or more each), then you have to "assemble" it. You can save money with LiPO (look at Hobby King), but it can be dangerous (read up on them). Good luck.