How does an electric bicycle use a battery and motor to assist pedaling?

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An African American family of four, all wearing helmets, rides bicycles together on a tree-lined country trail, with two children in front and two adults following behind. — bicycle Family bicycling on a country road.

An electric bicycle, or e-bike, is a bicycle equipped with an electric motor and a battery that work together to assist or replace the rider's pedaling effort.1

The system functions by drawing electrical power from the battery to drive the motor, which then provides mechanical assistance to the drivetrain. This integration makes pedaling significantly easier, reducing the physical exertion required for cycling. Depending on the specific model, riders can activate this assistance through their pedaling motion or by using a button to accelerate, effectively transforming the experience of riding a vehicle that is traditionally powered solely by human force.1