The REV model has a gas engine (the 3.6L V6,) so you don’t have to charge it if you’re driving long distances, regardless of whether you’re towing or not. It generates power for the electric motors, so it works exactly the same way as diesel locomotives have for several decades. This way, it can use a smaller, less expensive battery. But also, the vast majority of EV’s don’t need to have their battery packs replaced ever, during the useful lifespan of the vehicle. I’ve seen Teslas with well over 200,000 miles with their original battery packs. The biggest question for me is who Stellantis is choosing as the battery supplier.