An electrical appliance including a housing containing an electric motor and a storage battery pack for energizing the electric motor at an operating voltage of more than 42 volts. The storage battery pack includes a plurality of storage battery cells electrically connected so as to form at least two cell groups having a cell voltage of less than 42 volts. A connector assembly includes a bridge circuit configured to electrically connect the cell groups with each other so as to provide the operating voltage of more than 42 volts while establishing electrical connection between the storage battery pack and the electric motor.