Electric device in the form of a manually operated machine tool or a suction device

The appliance (10) has an electrical circuit for switching of energy storage devices (16,17) respectively connected in series with terminal contacts (35-38) of connecting terminals (33,34). A sum of power supply voltages of energy storage power supplies (U1,U2) is fed as a mechanical power supply voltage (UM) for the electric drive motor (12). The circuit is configured for deactivating the connecting terminals which connect the feed lines (39-42) with switches (43,44) and activating the connecting terminals for connecting the terminal contacts with feed lines. An independent claim is included for energy storage arrangement for use with electrical appliance.