I let my son drive a few more times using the same 6s1p A123 pack on grass and concrete. Power usage went up a bit, but not by much. After the pack dumped, he asked to go faster, so I swapped in 7s1p A123's. He was content after that. The great thing is that I can charge these packs up in half an hour with my cheapo charger. Once I get my "better" charger, the charge time will drop down to 15 minutes. The great thing is, that after he is done driving around, I take the same packs and stick them in my RC's.
This is the on-offroad graph
This is the onroad only 7s1p test.
