The category of electric bicycle can be varied in different ways. Due to its legal issues, normally it is classified according to the fact that how the power is activated and controlled.
Motor being engaged by pedal activation, this kind of electric bicycle is well-known as Pedelecs, which can also be classified to be Pedelecs proper and S-Pedelecs. For the former one, the speed of the drive system is limited, so the power of the motor is relatively low. While for the latter, the motor is more powerful, therefore, riders would always require licenses and wear helmets.
For this kind of electric bicycles, the electric motor is manually engaged and controlled by operating the throttle equipped on the handgrip.
As the name suggests, this kind of electric bicycle is combined with both pedal activation and throttle operation, therefore riders are able to choose whatever they appreciate to drive the bicycle。