I'm not thinking that battery replacement would be seen as a way of recharging or be done on the road. It would be infrequently done, when a change in capacity

I'm not thinking that battery replacement would be seen as a way of recharging or be done on the road. It would be infrequently done, when a change in capacity/technology is required or the module is worn out. The interface specification could go beyond the electrical, including things such as heat removal.