SureFire pioneered the use of compact, energy-dense 123A lithium batteries because of their many advantages over alkalines, such as higher power density, superior voltage maintenance, lower weight, wider temperature tolerance, 10-year shelf-life, and built-in heat/fault protection. Optimize the performance of your flashlight, WeaponLight, or headlamp and increase your safety in the field by using SureFire's inexpensive yet high-performance made-in-the-USA 123A lithium batteries.