I remember reading about the idea of swapping batteries and there were some major hurdles that made it unworkable in the real world. Size and shape of the batteries, battery stations (like gas stations) and what Mike mentioned (cycles) was a concern. batteries in electric cars are not the same chemistry as what we use in mods. They can take more cycles and abuse (high discharge) but still a valid point.
There is a lot of advancement in battery technology but still not ready for prime time for cars.
There is a lot of advancement in battery technology but still not ready for prime time for cars.