Abstract: A battery-operated device, for example, a blood pressure measuring device, consists essentially of a housing (2) and a compartment (3) to accommodate batteries. The compartment (3) is rotatably hinge-connected to the housing (2). The compartment (3) can be pivoted between an insertion position (E) for receiving batteries and an operating position (B). The device (1) has a standing surface (15). The compartment (3) for accommodating batteries is arranged so that the outside surface (4) of the compartment (3) in the operating position (B) forms part of one of the side walls (16a, 16b, 16c), and the inside (8) of compartment (3) is open at the top to receive batteries in the insertion position (E).