If Tesla offered an upgraded battery pack for the current Roadster using the 3.4A Model S cells (I think I have the correct number), would that also lead to faster acceleration as well as longer range? I think this would be a great upgrade offer from Tesla (even though many people wouldn't take them up on it for a few years until warranties start running out) and provide great, free advertising pushing the range to around 350 miles I think if the number of cells are kept the same.