Abstract: Provided in the present invention is a pressure washer (100, 200), including: a frame (5); a power unit (1, 1A) supported by the frame; a pump (13, 33), supported by the frame, driven by the power unit, and used to pressurize an influent fluid so as to output a pressurized fluid; a jetting gun (2, 2A), configured to receive the pressurized fluid outputted by the pump and jet the pressurized fluid; and a controller (23, 23A), connected to the power unit (1, 1A) and used to control operation of the pressure washer. The pressure washer is characterized in that: the controller (23, 23A) includes a heat sink (18, 38) used to dissipate heat from the controller, and the heat sink (18, 38) includes a heat sink body, and is provided with a fluid tube (16a, 17a, 36) so as to perform fluid-based heat dissipation. The present invention proposes using a fluid (e.g.

Abstract: A portable power supply device for an electric tool comprises: a power supply receiving portion, provided in or on a housing and used to receive a power supply supplying power to the electric tool, and a control unit, comprising a controller that is provided in the housing and is used to control the electric energy supplied to the electric tool. The power supply receiving portion comprises a power supply compartment, which is at least partially defined by a cover which can move relative to the housing between an opened position and a closed position. The power supply device further comprises a positioning accessory detachably and replaceably attached to the housing and/or the power supply receiving portion.