In a nutshell, this innovation comes from a company called VELLO based out of Austria. The new product is a lightweight, self-charging folding electric bicycle. Estimated delivery for March 2018.
From the manufacturer:
With the new smart technology from BIKE+ by ZEHUS, the all-in-one system changes the
motor map automatically and continuously in order to keep the battery charged at all times.
Energy is harvested by riding downhill, braking, and pedaling. Mechanical energy is converted into
electrical energy thanks to the integrated kinetic energy recovery system (KERS) commonly used in
motorsports. Additional energy is released to recharge the lightweight, integrated lithium-ion battery,
allowing the bike to recharge without a power outlet, extra wires, or having to remove the battery.
Check out this video to see how it works!