The present invention relates to a nozzle (1) for a dust collector (2). The nozzle comprises the following components: a casing (3); a suction opening (4) which is located on a base-side of the casing (3); a cleaning roller (6) which is rotatably supported in the casing (5) and is driven by an electric motor (5); and an accumulator apparatus (8) which supplies electricity for the electric motor (5). According to the invention, the electric motor (5) has a standard horsepower between 50 watt and 100 watt, and furthermore, the accumulator apparatus (8) has an energy density larger than 200 watt-hour/liter (Wh/l) relative to the total volume.