A hydrogen fuel cell system includes devices and methods to combine reactant fuel materials and aqueous solutions to generate hydrogen. The fuel cell system includes a fuel cell, a fuel cartridge, and a supply of pressurized aqueous solution to generate power for portable power electronics. The fuel cartridge includes a top cap with an overmolded face seal gasket that provides an offset injection point on the fuel cartridge. The aqueous solution is delivered into the fuel cartridge to generate hydrogen for the fuel cell which then produces power for the user of the electronics.
FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT
 This invention was made with government support under contract number DE-FG36-08G088108 awarded by the U.S. Department of Energy. The U.S. Government has certain rights in this invention.