Duracell® Procell® alkaline lantern batteries deliver outstanding performance and reliability. 6 volt cell with a spring terminal. Long lasting and dependable – even after seven years of storage. Lasts up to ten times longer than super heavy duty zinc carbon batteries in power demanding applications. Long service life at high drain discharges. Operates reliably in temperature extremes of -20°C to 54°C Date coded to ensure freshness. Contains no added mercury.