It's possible for that to be a thing, but batteries are pretty heavy. Moving hundreds of pounds in and out of your car could be a rather aggravating chore just

It's possible for that to be a thing, but batteries are pretty heavy. Moving hundreds of pounds in and out of your car could be a rather aggravating chore just to avoid a few stops. There's also issues of standardization. You'd need a common battery form factor and connectors and voltage, and you might have to deal with fluid connections too since most EV batteries use liquid cooling. I think the better long-term solution is electrified roads. (There are some pilot projects in Sweden that use rails embedded in slots in the road surface. The underside of a car or truck has a device that makes electrical contact.) With the right infrastructure it should be possible to drive non-stop from, say, Seattle to New York with a battery pack that's only good for a hundred miles or so. I think giant batteries on EVs the same way I think about pontoons on commercial airliners: if, like Pan Am, you need to rely on existing port and harbor infrastructure because the airports you want to use haven't been built yet, sea planes make a lot of sense. But now that we have modern airports they don't.