Not an ebike, but cool battery.

Not e-bike but scooter.

Nice though.

I can’t read Chinese, but: https://www.yadea.com.cn/model-details/q50

They have an English language site, but it doesn’t seem to cover the Q50: https://www.yadea.com/

This is cool tech, I wish I could use it so I could justify buying something like this.