A decorative piece in the form of a topper designed to seat at the base of the shaft and extending from the handle body of a powered toothbrush is provided. The energy converter cell forms a galvanic element, which can be discharged by delivering electrical energy to an ohmic consumer resistor that is connected to the electrodes and can be charged by a supply of thermal energy. The whirling air current may prevent the filth from being drawn into the vacuum-generating device of the vacuum cleaner. An embodiment of the connection includes at least one interface area of the connection that lacks intimate contact between the pin and the box upon initial make-up. The sensor circuit supplies rate drive signals to the rate sensor and detects rate signals in response to the rate drive signals.