Running on a single 18650 battery, the Folomov 18650S offers 900 lumens, nine different modes, and a host of features to prevent it from harm in the field. In terms of output, the flashlight casts a beam 167 meters long for up to 5 hours. Knock it down to moonlight mode for a whopping 700 hours runtime. Built from aircraft-grade aluminum, its both impact resistant and IPX-8 waterproof. However, despite its strength, the light weighs less than 2 ounces. Other features include a lock function to prevent accidental activation, a high-efficiency current to protect the LED, and a stainless steel clip for pocket carry.