Reliable energy, thanks to innovations like Energizer's Power Seal Technology. Up to 10-year shelf life means you'll always have power when you need it. No added mercury or cadmium. Series Max Quantity (4) 1 PK Ansi Neda 13A/IEC-LR20 Nominal Voltage 1.5 Volts Rated Capacity Mah 17,900 Chemical Composition Zinc-Manganese Dioxide