You mean like what I tell people on their birthdays? "You can forget about the past because you can't change it. Forget about the future, too, since there's no way to predict it. Might was well forget about the present while you're at it, 'cause I didn't get you one. As to the OP, I think it would be pretty cool, but the battery is such an expensive and integral part of the car that by the time it wears out the car is too old to make it financially worthwhile.