[llukas]

All parts of plane are optimized to work with jet engine.

For plane designed from ground up as electric fact that jets land lighter than take off is not relevant.

It is only relevant if you want to retrofit electric engine on jet engine optimized chassis - which is not only possible way.

Bit more info on how thought process goes: https://spectrum.ieee.org/aerospace/aviation/how-i-designed-...

[mannykannot]

Batteries have a much lower specific energy that hydrocarbon fuels to start with, and then that fact that the aircraft weight does not decrease over the duration of the flight is one more disadvantage (currently a second-order issue, given the first difference.)

These are constraints that can be designed around, and you have more freedom to do so when designing from scratch, but doing so is not a optimization, it is a straightforward trade-off between weight and duration. There's no optimal hump on that line.