A solar cell lead wire includes a conductive material, and a solder plated layer on a periphery of the conductive material. The bipolar plate assembly further includes a staggered seal arrangement to direct gaseous reactant flow through the fuel cell such that the seal thickness maximized while the repeat distance between adjacent fuel cells is minimized. A three-sided frame is joined to the other three sides of the two base plates to completely enclose the circuit board. In another embodiment, a vessel containing contents to be mixed is positioned in a holder on a mixing machine, and a splash shield is positioned over the opening of the vessel.