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The electric motor is the most common type of motor for RC models. It is usually maintenance-free and quiet. Electric motors can be divided into DC (usually with a speed of 10 to 30 km/h) and AC, which are also called brushless (up to 50 km/h or more). AC motors have less power consumption, so they last longer on one charge than DC motors that have an equally large battery.
Battery capacity is measured in amp-hours (Ah) or watt-hours (Wh). Most batteries range between 300 and 600 Wh, with a charging time of less than 6 hours. Battery lifetime varies between 18,000 and 30,000 km, usually with over 1,000 charges. Under normal use, the battery should last three to four years; however, specific values depend greatly on the manufacturer.
In off-road mode, the electric motor produces many times more power than normal. This is particularly useful when riding on difficult terrain or up steep hills. In addition, because of the increased power, this mode shortens the battety life.
The standard for electric bike motors is 250W. The main difference therefore is not power, but the location of the motor. It can be placed in the front or the rear hub, or, in more expensive models, on the seat tube.