TheSureFire CR123 Lithium Batteries, unlike alkaline batteries, boast a ten-year shelf life, which means these 3V lithium batteries will always be ready when you need them. Optimized for use in the SureFire flashlights, these Batteries developed by SureFire offer a wide temperature tolerance for easy storage and maximum use. Featuring built in heat and fault/short-circuit protection, the SureFire CR123 3V Lithium Batteries the most reliable battery on the market to ensure your high-drain electronics are always prepared for an emergency situation. made in specialized factories, the Sure Fire CR123 Lithium Batteries provide you with incomparable strength in a tiny package.