An autopilot on an RC car that small, all I can say is WOW!!! Bet you anything that guy is working for Tesla now! As far as the battery goes it's an old 3,300mah NiMh that's on its last legs so I'd go with the car being a P24D (23.74 watts) but I'm probably going to hit up RC Country Hobbies in the near future for a few new LiPo's. Come to think of it here's one to wrap your head around: Back in 1995 (give or take) the best RC car battery you could get was a 6 cell, 7.2 volt, 1.5Ah (10.8 watts) NiCad that cost $17.95 according to the sticker that's still on the battery I somehow still have. Today at about the same size and weight you can get a 2 cell, 7.4 volt, 8Ah (59.2 watts) LiPo with an MSRP of $199.99, and I think there are higher capacity batteries on the market than that. Ignoring the price tags that's a bit less than a 600% increase in battery energy density in about 22 years! At that rate it won't be long befor electric power really does make gas obsolete in every way.