The Energizer Max Alkaline 6-Volt Spring Terminal Lantern Battery is specifically formulated to provide long-lasting and dependable power for your everyday safety and security devices, such as smoke alarms. Energizer Max Alkaline 6V Lantern Battery is unsurpassed in performance in high tech devices and has a 7-year shelf life. Made with no added mercury to protect the environment. Built and manufactured with the high-quality standards that make Energizer a world-renowned company, the Energizer Max 529 has a wide operating temperature for use in any weather condition. Operating Temperature: 0°F - 130°F.