The Fenix TK16 gets an upgrade with this V2.0. It holds to its traditional high performance LED flashlight that features a dual tactical tail switch to access the 5 output modes and strobe. It puts out a staggering 3,100 lumens and 43 hours and 20 minutes runtime in ECO mode (30 lumens). The TK16 V2.0 features a durable, waterproof design intended for harsh outdoor and military use. Made from aircraft grade aluminum with a hard anodized finish, the body is knurled for grip, has a non-rolling design, and a steel strike bezel with tungsten tips. The TK16 V2.0 uses an included ARB-L21-5000U Li-ion battery. Mode: Output / Runtime Turbo: 3100 lumens / 2 hour 40 minutes High: 1000 lumens / 2 hours 50 minutes Mid: 350 lumens / 8 hours 20 minutes Low: 150 lumens / 19 hours 10 minutes ECO: 30 lumens / 43 hours 20 minutes Strobe: 3100 lumens