SYSTEM FOR REFUELLING A HEARING AID FUEL CELL

A system and method for refuelling a fuel cell having a fuel reservoir. The system includes a cartridge () having a first reservoir () for storing fuel for the fuel cell and a refuelling unit adapted to receive a waste liquid from the fuel reservoir of the fuel cell and provide fuel from the first reservoir () of the cartridge () to the fuel reservoir of the fuel cell. The system further includes a second reservoir for storing the waste liquid from the fuel cell, a cartridge for use with the system, a refuelling unit for use with the system.