Our Energizer 9 Volt batteries are fresh and highly dependable, delivering long-lasting power. Energizer 9 Volt battery operates reliably in temperature extremes of -18° C to 55° C. Each Energizer 9 volt battery has a minimum 3 year shelf life and is date coded with the expiration month and year stamped on each battery. The Energizer 9v battery contains no added mercury. Special disposal not required.