Cathode is a mixture of high purity electrolytic manganese dioxide and carbon conductor. Anode is a gelled mixture of zinc powder and electrolyte. Separators of specially selected materials prevent migration of any solid particles in the battery. Steel can confines active materials and serves as the cathode collector. Brass collector serves as the anode collector. Positive and negative covers provide contact surfaces of nickel-plated steel. Non-conductive plastic film label electrically insulates the battery. Nylon seal provides a safety venting mechanism.