They do, and it's available in some parts of Europe too (Nio is the brand). However, the battery is rented rather than owned, and it's expensive. 169 Euro per month to rent the 75 kWh battery ($200/month), or 289 Euro per month to rent the 100 kWh battery ($335/month).
Interesting. I wondered who owned all the batteries. Even if the vehicle owner owned 1 battery, someone would have to own the pool of spares so that there could be a freshly charged battery to swap in to your car. I suspect this set-up had a lot more appeal when DC fast charging was 50 kWh. Now that the slower DC fast charging stations are 250 kWh I suspect faster trip times would be had with cars that have to be charged versus cars that had battery swaps. You would only have a 100 second swap in the case of no line.
$335 is around 3,300 miles in a 30 MPG ICEV.
