An electrical appliance (100) comprises a digital control system (SC), configured for enabling the performance of a plurality of pre-determined basic functions, and an auxiliary device (200) comprises means (PM, 230-231) for acquiring and/or processing aux...

The device (1) e.g. sensors, has a generating unit generating electrical energy for operation of the device. A terminal supplies auxiliary energy through supply lines. The generating unit is formed as reaction cells of a flow battery and connected to suppl...