AndyPandy i think this is the only way it will catch on they would have to be able to exchange the batery in less then 10min. But it could silde out on a a rack that can be placed on a trolly and changed. The rack would be able to fit into racking for charging. This could be done through the car dealer ship with a sat nav that could tell you where your nearest one is when the charge gets low. They could also have some on motaways. All the bateries will mean more are being produced one car would average around two batteris each so it will work out cheaper. Why does the car industry pay out billions a year when they can just look on here.