As powerful as any primary light and as small as any backup light, the Nitecore E4K Rechargeable LED Flashlight packs more lumens and more output options than most full-size duty lights—ensuring you'll reach for it time and again whether you're on duty, on the job, or on the trail.

Its four Cree XP-L2 V6 LEDs are driven by a high-capacity 21700 Li-ion battery with outputs ranging from an ultra-low 2 lumens for doing tasks like reading without disturbing your bunk mates or checking IDs up to a darkness-piercing 4400 lumens for searches and to clear rooms safely. Three intermediate outputs allow you to select the perfect output for any situation you might come across. In addition to the five output intensities, you also have three specialty modes: An SOS distress signal, a location beacon, and a disorienting strobe. You further have the option for instant access to the turbo mode or the strobe mode depending on your situation or use. All modes and outputs are accessed from a single push button located on the handle with an intuitive interface.

To hold up to daily use, the body is CNC machined as a single uni-body to limit parts, reduce weight, and better dissipate heat. The housing is further treated with a hard-anodized finish that resists scratches. O-rings seal the interior to an IP68 rating, making it dustproof and waterproof to a depth of almost 7 feet, and it is also impact rated to handle drops of over 3 feet. Its compact and lightweight design brings it in at under 5 inches long and under 3 ounces in weight, so you can carry it all day and night and you'll barely notice that it's there. Nitecore includes a holster and a reversible clip to give you multiple carrying options, as well as a battery cartridge that lets you use two of the more common CR123A batteries if you get stuck without the ability to recharge the included 21700 battery.