Good point, that's why I'm thinking of a VERY robust tank, sealed to the outside world, except for the electric connections, which contains the H and H20. I'm

Good point, that's why I'm thinking of a VERY robust tank, sealed to the outside world, except for the electric connections, which contains the H and H20. I'm assuming it's not very hard to make a tank that can survive almost any collision. It would be a lot more expensive then a gas tank but I'm guessing less costly then all those lithium batteries?