Viridian 1/3N 3V Lithium Battery 4 Pack 13N4 Viridian Tactical Batteries Deliver The Power To Prevail When It counts. Advanced Lithium Technology, Matched To The demands Of Tactical tools, ensures stronger, Longer-Lasting Energy Under All conditions. For Performance You Can Trust Under Fire. These Batteries Are For Laser Sights, Weapon-Mounted Lights And Tactical flashlights. They Have Maximum Life For Instant Readiness And Maximum Power Delivery Start To Finish. They Feature a Low-Impact, Recycle-Friendly Design.