It's like those portable cassette tape players from the 1980s. Just enough battery power to get you through both sides of The Cars' debut album and maybe side one of "Candy-O". If you wanted to hear "Night Spots", you had to flip the tape and change out batteries.
Huh ... I got many cassettes worth of play out of one set of batteries on my Sony Walkman, back in the day. Maybe I used a better grade of battery ...
I think electric vehicles, in general, are stupid. But ripping on an experimental airplane for not being as “practical” as you might like is also stupid.