REFUELLING UNIT FOR REFUELLING FUEL CELL OF HEARING AID

Disclosed is a refueling unit for refueling a fuel cell. The refueling unit comprising a fuel cell receiving section and a cartridge receiving section. The refueling unit is configured to receive through a waste inlet a waste fluid. The refueling unit further comprises an intermediate fuel reservoir for storing fuel. The refueling unit is configured to firstly receive in the intermediate fuel reservoir a predetermined amount of fuel from a cartridge and secondly empty the intermediate fuel reservoir and guide said fuel stored therein into the fuel reservoir of a fuel cell connected to the fuel cell receiving section.