pedelec
A bicycle with an electric motor which assists the rider but only while they are pedalling.
informal
The need of using the pedelec as a multipurpose vehicle was also discussed: As far as the infrastructure was concerned, the central issues were battery change and battery loading stations as well as a possible leasing model for batteries because they were considered to be the most expensive spare spart of the bike.
Where it comes from
From German Pedelec, a shortening of pedal electric.
Adapted from the Wiktionary entry pedelec (CC BY-SA 4.0).