This excellent flashlight produces a total of 3100 lumens, all powered by a single 21700 battery. The 21700 battery is included with your purchase, it is USB Type-C rechargeable, and will need to be removed for charging. A new feature of the TK16 V2.0 tactical flashlight is the advanced pulse-frequency transmission system for better anti-interference performance. Some of the most remarkable features of the Fenix TK16 V2.0 were kept on this update, like the dual tail switch and instant strobe for real tactical performance. FENIX recommends the TK16 V2.0 to anyone who needs a compact tactical flashlight that provides an impressive amount of light power. *Regular Fenix Rechargeable 21700 Li-ion Battery - 5000 mAh Battery is not compatible with Fenix TK16 V2.0* SPECS Luminus SST70 LED with a lifespan of 50,000 Outputs Turbo: 3100 Lumens, 3.67 hours, 1247 ft High: 1000 Lumens, 2.83 hours, 722 ft Mid: 350 Lumens, 8.33 hours, 410 ft Low: 150 Lumens, 19.17 hours, 263 ft Eco: 30 Lumens, 43.33 hours, 131 ft Strobe: 3000 Lumens Stainless steel strike bezel with tungsten breaking tips Innovative APF System allows a more compact structure and a higher output while also increasing efficiency Intelligent Memory Circuit Digitally regulated output maintains constant brightness One-handed tactical grip compatible Exposed Tactical tail switch for quick operation Momentary on function Dual Switch tail cap for easy power and output selection True-Instant Strobe Multi-Layer Body Specialized Remote Pressure Switch Integration Made of durable aircraft-grade aluminum Waterproof to IP68 standard (Underwater 2 Meters for 30 Min.) USB Rechargeable 21700 battery included - USB-A to USB-C Cable - Single Port Charger 1 Amp/2 Amp at 10 Watts Max Compatible with Fenix accessories like the AER-05 Remote Pressure Switch and ALG-00 Tactical Flashlight Mount, plus filters and diffusers BATTERIES USED Included: ARB-L21-5000U USB-C Rechargeable 5000mAh 21700 battery - Must use a Single Port Charger 1 Amp/2 Amp at 10 Watts Max Must remove battery to charge SIZE Length: 5.6 inches Head Width: 1.34 inches Body Width: 1.0 inches Weight: 3.95 oz (Excluding Battery) INCLUDED Fenix TK16 V2.0 LED Flashlight Holster Lanyard USB Type-C Charging Cable 21700 5000U Battery Spare O-Ring Instruction Sheet and Warranty Card MORE INFORMATION Built for Tough Duty Use This tactical flashlight was built with tactical use in mind. Perfect for police officers, military personnel, and tactical flashlight enthusiasts. This light is built from a high strength aluminum, making it tough and able to withstand the test of time. It's impact resistant and waterproof so it can go with you anywhere rain or shine. The TK16 V2 features a tungsten steel hard alloy bezel which not only adds a layer of protection for the LED, but also can be used in self-defense situations. It is designed for tactical use ensuring that you have a momentary-on, an instant strobe, and can operate the flashlight with a single hand. It features two switches with the main switch turning the flashlight on and off and accessing momentary-on while the functional switch cycles through the outputs. This switch also accesses strobe whether the light is on or off. This way the strobe mode is always ready to go. 3100 Lumen Tactical Flashlight The Fenix TK16 V2 delivers 3100 lumens! That is some intense power behind this tactical flashlight. It also has an impressive beam that lights up far into the distance. The maximum beam distance with the TK16 V2 is 380 meters or nearly 1,247 feet. Since Fenix designed this as a duty flashlight, they created it to be fairly compact at a little over five and a half inches in length. It's not a pocket flashlight by any stretch of the imagination, but it is compact enough to easily carry with you whether you clip it onto your pocket using the removable pocket clip or you carry it in its holster. USB-Rechargeable 21700 Battery with Fast Charging This is one of the biggest differences between the original TK16 and the TK16 V2 aside from the obvious upgrade in output. Whereas the TK16 ran on an 18650 battery, the TK16 V2 runs on a 21700 battery which gives you more power without adding too much weight or bulk to the flashlight itself. The TK16 V2 comes with the ARB-L21-5000U lithium-ion battery. This battery is USB Type-C rechargeable meaning that it has a fast charge and you don't need a battery charger to charge it. So though the TK16 V2 is not rechargeable, this USB rechargeable battery is the next best thing.