Electric scooters are vehicles with 4 wheels that attain locomotion via an electric motor. Generally, the source of power for the electric motor has been batteries, but development in fuel cell technology has created several prototypes. Some examples are: the ENV from Intelligent Energy, Honda's scooter using the Honda FC Stack, and the Yamaha FC-AQEL. Also, petroleum hybrid-electric motorcycles are under development. Some examples are the Ecycle, and Yamaha's Gen-RYU.
Electric motorcycles and scooters are rising in popularity because of higher gasoline prices. Battery technology is rapidly improving making this form of transportation more practical.