The SFLFP123 batteries are an ideal choice for customers who prefer rechargeable 123A cells for powering SureFire illumination tools, such as weapon lights and hands-free lights. Although they do not match the capacity of SureFire 123A lithium primary cells, SFLFP123 cells are safe, cost-effective, and retain about 80 percent of their original capacity even after hundreds of charge cycles. RSR -