The invention relates to an electronic apparatus (100) comprising a charging module(20) for receiving external energy(RF1) and for transferring it to a rechargeable energy storage(10) in a "charging state". Moreover, the apparatus comprises a processing module which can be operated in a working state that is enabled if the charging module(20) is in the charging state and the apparatus is in a standard operating mode. The processing module may for example be a communication module(30) that can communicate wirelessly in its working state. In the standard operating mode, communication with the apparatus (100) is thus only possible if the apparatus (100) is simultaneously charged. The communication module(30) can therefore be completely switched off during the residual time, thus reducing power consumption and avoiding erroneous communication or misuse.