The ProTac HL 5-X are 3,500-lumen tactical flashlights that can use either two proprietary Streamlight SL-B26 protected Li-Ion USB rechargeable battery packs or four CR123A batteries. The ProTac HL 5-X comes packaged with four CR123A batteries. They are the newest and brightest addition to the ProTac series. They offer the latest in power LED technology and three different user-selectable programs. The output from the LED results in one of the brightest tactical lights available. The “sure grip rubber sleeve” and included lanyard ensure you'll never lose your grip.