I don't think it would be viable to do battery replacement. Pretty much no commercial EVs do it, partly because we don't need to, and partly because it's pretty

I don't think it would be viable to do battery replacement. Pretty much no commercial EVs do it, partly because we don't need to, and partly because it's pretty hard problem. Battery packs have a pretty narrow range of temperature where they perform well so they need fluid lines to either heat or cool them, in addition to the electrical connections. Plus with a plane, the only place that really makes sense to put the fuel or batteries is in the wings, so it couldn't be a flat pancake battery pack like in a passenger car. I don't think you could make a wing where you can remove the battery from the wing easily, it would have to be sealed in place. So the only way I think that would really make sense would be for the fuselage to be removed from the wing assembly, and then re-attached to a fully charged wing assembly. And that doesn't seem that practical either.