A method and system is provided for producing direct current electricity from electrochemical oxidation of one of at least magnesium, zinc, or aluminum metal by at least one of water and oxygen to produce at least one of magnesium hydroxide, zinc hydroxide, or aluminum hydroxide. The design of dry-cells for the same using relatively light weight materials provides a transportable, infinite energy supply system that is activated with the addition of at least one of an aqueous solvent or a polar solvent to produce an electrolyte solution. Methods, systems, and apparatuses for the same are provided for introducing electrolyte solutions and changing solid plates comprised of at least one of magnesium, zinc, or aluminum—also referred to as fuel cards—to initiate or sustain electricity generation. Methods, systems, and apparatuses are provided for the same that accelerate electricity generation by the introduction of one of at least air or oxygen. Methods, systems, and apparatuses for the same are provided that reduce electricity generation by introduction of at least one of an inert gas such as nitrogen or by separating the electrolyte solution from the reaction cell. Systems, methods, and apparatuses for the same are provided.