REPLACEABLE ACCESSORY FOR A SMALL-SCALE ELECTRICAL UNIT, AND METHOD FOR DETERMINING THE PERIOD OF USE THEREOF

摘要

The invention relates to an accessory for a small-scale electrical unit, for example an attachable brush for an electrical toothbrush or a shaving element for an electrical shaving appliance, said accessory comprising a data memory and a transponder. The inventive accessory also comprises an electronic circuit which modifies a value stored in the data memory whenever it receives a corresponding signal. The invention also relates to a method for determining the end of the period of use of the accessory.