Surefire Fishbowl Battery Display, CR123A Lithium, 65 Pairs, Red SF2-SW-BULK Optimized for use in SureFire flashlights" SureFire lithium batteries pack a lot of power into a small package. And unlike alkaline batteries SureFire high-performance lithium batteries boast a ten-year shelf life" which means they will be ready when you need them" every time.