While there is no single, agreed-upon definition for what constitutes an E-bike, they are generally accepted to be any standard, pedal-powered two- or three-wheel vehicle that has an electric motor which can be used to assist the rider's pedaling efforts.

Electric motorcycles and scooters are plug-in electric vehicles with two or three wheels. Power is supplied by a rechargeable battery that drives one or more electric motors. Electric scooters are distinguished from motorcycles by having a step-through frame, instead of being straddled.