Airwheel Elsa Apr 1, 2017
Just try Airwheel R5 , it is a nice bike with Sony lithium battery, I have one at home :p
You can still ride it when power used up. It can go further and faster.
Three modes of riding: human power mode / electric power assisted mode / pure electric power mode (100km traveling range when in electric power assisted mode)
235W powerful hub motor, double disc brake system, IP56 waterproof level
Even if some years later, you need to replace the battery , it will not cost so much.