Better Place has solved this. They lease out the batteries. You drop your old battery off and get a new battery in less time than it takes to fill up a gas tan

Better Place has solved this. They lease out the batteries. You drop your old battery off and get a new battery in less time than it takes to fill up a gas tank. They can figure out how many miles you put on the battery pack in any number of ways (even live while you drive via 3G) and bill you on that. You can also charge the battery on your own. I'd sign up for it even if they billed me the same for charge I supply or they supply.