A fuel source (100), a fluid gauge adapter (300), a fuel cell system (200) and an associated method. The fuel source (100) has a gauge (104) comprising an electronic multi-stable display (106). The fuel cell system (200) and method relate to receiving fuel from the fuel source (100), determining (212) a fuel consumption of the fuel cell system (200), calculating (214) a substance level of the fuel source in accordance with the fuel consumption and updating (216) an electronic multi-stable display of the fluid gauge of the fuel source in accordance with the substance level.