There are three different Bike + varieties.
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 intoelectrical 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.