[i-dont-remember]

Video[0] isn't a direct answer, but I found it helpful for understanding the trade offs that come when considering using electric power for a plane vs regular fuel. They show the math in an easy to follow diagram.

tl;dr for their small kit aircraft the weight of batteries they would need to match the stored energy of equivalent fuel (even with a battery at 500wh/kg) would be 5-10x heavier, and also not get lighter during the flight. They said for long range it doesn't make sense, but that there are lots of companies iterating in the short range electric space.

- [0] https://www.youtube.com/watch?v=LdSnHQtoVTI