yes, battery issues are a challenge for electric planes: https://www.wired.com/2017/05/electric-airplanes-2/ https://www.wired.com/2017/05/electric-airplanes-2/

yes, battery issues are a challenge for electric planes: https://www.wired.com/2017/05/electric-airplanes-2/ https://www.wired.com/2017/05/electric-airplanes-2/ however, but they are not insurmountable, and many people are doing it:https://spectrum.ieee.org/aerospace/aviation/cheaper-lighter-quieter-the-electrification-of-flight-is-at-hand https://spectrum.ieee.org/aerospace/aviation/cheaper-lighter... also, the high altitude penalties for electric motors are completely negligible. cooling efficiency for an electric motor has nothing to do with power output.