The same sort of breakthrough is needed for not-powered-by-gasoline cars, so it's not like it's not a being-worked-on problem. :) This seems like a good applic

The same sort of breakthrough is needed for not-powered-by-gasoline cars, so it's not like it's not a being-worked-on problem. :) This seems like a good application for fuel cells, actually, given that the energy density is five or ten times that of the best chemical batteries.