You can triple the range, and more, readily by redefining the car. Most of what you drive around is dead weight -- but it's soo convenient to build that into, or onto, the vehicle for eventual -- albeit infrequent -- need. And some of the mass of the vehicle is there to provide protection of the occupant(s) against injury in the event of collision with... another similarly-massive vehicle. And, as with rockets and their fueling, you need more 'car' to carry the larger engine (or motors) and fuel (batteries) required of a larger car... It's a vicious-circle kind of racket. Inter- and intra-. Stop! Strip the vehicle down to what is necessary to provide the service minimally asked of it: transport (movement at speed) of one individual. Cleave off transport of goods to automata; no hurry or worry with inanimate objects. The really, really smart car stock is made up of electric trikes with bicycle wheels. The bleeding-edgier folk can drop one wheel and go in-line.