

It’s a problem of range. Jet planes have the advantage that they get lighter as the flight goes on, so for shorter flights, the battery issue is not as big of a problem. It’s not a physical impossibility to achieve flight with lithium ion, it’s a question of how far.
You’d have to be calling all hours of the day (except the 6 hours of school during school days) for five weeks to reach $2,100 at that rate.