Aren’t EV batteries already big enough? As in, you probably shouldn’t drive more than 8 hours or so in a day without taking a long break and getting a good night’s sleep. There many models on the market with that capability, right? Also, if that’s the type of driving you’re doing frequently, an ICE vehicle or ideally an FCEV would be a better choice, just in terms of avoiding battery wear and tear and reducing the amount dead weight you’re schlepping around. If you’re only going on long drives occasionally, just rent a suitable vehicle or consider another from of transit like a train or a bus and then rent a little EV near your destination.