The UC40 Basic Rechargeable LED Flashlight from Fenix is a durable, compact flashlight with a rechargeable Li-ion battery and included USB cable. It offers output in four stages from 9 to 420 lumens, as well as a 420-lumen strobe mode. A convenient side switch in the head operates the light. Runtimes vary from 2 hours at full power to 130 hours at 9 lumens. This flashlight has a glass lens with an anti-reflective coating and an aluminum alloy build with a premium type III hard anodized anti-abrasive finish. It's waterproof to 6.5' (IXP8 standard), impact resistant to a drop from 3.3' and provides an anti-roll, slip-resistant design.
The output is digitally regulated to maintain constant brightness and it operates with multiple battery types including 1x ARB-L1S rechargeable, 1x 18650 Li-ion and 2x CR123A lithium batteries. Its Cree XP-G2 R5 LED lamp has an approximate life of 50,000 hours and it features over-heat protection and Intelligent Memory Circuit to activate the last illumination level selected when turned back on.