Because I want to stop for at most 10 minutes every 2 hours. (better yet I want a self driving car where 8 hours latter I wake up where I'm going, and the farther I get in that 8 hours the better) With gas cars we can do this, with batteries that requires a lot of expensive, heavy batteries (the heavy is important because energy is expended just hauling them around).

I don't know if this is a good/useful solution to the problem, but it is an obvious idea to consider.