Methods, processes, and systems of transportable nuclear batteries are provided. In one embodiment, the battery may comprise a sealed reactor shell, a reactor core, and a generator. In further embodiments, the transportable nuclear battery may comprise a nuclear fuel in the reactor core wherein the fuel comprises plutonium, carbon, hydrogen, zirconium and, thorium. In some embodiments, the fuel may comprise hydrogen-containing glass microspheres, wherein the glass microspheres, may be coated with a burnable poison, and other coating materials that may aid in keeping the hydrogen within the microsphere glass at relatively high temperature. The disclosed methods, processes and systems may aid in providing energy to remote areas.