The present invention pertains to a rechargeable hearing device (1). The proposed hearing device (1) comprises a power supply system (6) with a control unit (10) adapted to control operation of a sound system (2) of the hearing device (1) dependent on a control input signal, wherein the control input signal depends on a type information provided by an external power source (11) indicative of the type of external power source (11) from which the hearing device (1) is receiving a power signal. Moreover, the present invention provides a hearing system (100) comprising such a hearing device (1) and an external power source (11) as well as a method for operating such a hearing device (1).