Surefire 2 Rechargeable LFP123 Batteries, Includes Charger SFLFP123-KIT The SFLFP123-KIT is the perfect solution for customers who prefer to use rechargeable 123A cells when powering SureFire illumination tools" including WeaponLights and hands-free lights. While they lack the capacity of SureFire 123A lithium primary cells" SFLFP123 cells are safe to use" cost-effective" and they retain approximately 80 percent of their original capacity even after hundreds of charging cycles. The included smart charger can fully charge two batteries in three hours in the convenience of your home" office" or vehicle.