Hydrogen is one of the most abundant elements in the universe. Lithium ION batteries are extremely popular right now, but Lithium is limited and the energy density of Lithium ION batteries is nowhere near the energy density of hydrogen. Hydrogen is not something that people should be afraid of. As an energy carrier, hydrogen is ideal. The chemical reaction that produces water can produce an electric current with the use of an appropriate proton exchange membrane or PEM fuel cell.