A fluid dispenser having a fluid reservoir including a shoulder from which there extends a neck defining an opening; and a dispenser member, such as a pump or a valve, including a body that is held in stationary manner in the opening of the reservoir. When employing such beams, the addition of electrons or negative ions for neutralizing the effects of space charge is often crucial for achieving success. The method also looks at the actual voltage of the fuel cell that is falling to determine whether it is a below a predetermined minimum voltage threshold also indicating that hydrogen starvation of the anode of the fuel cell is occurring.