The E21 from Fenix is an updated version of the E20, with a brighter LED and two outputs, 150 and 48 lumens. The light is powered by 2 common AA batteries and can run for 11 hours on the lower output.
Patented physical structure avoid circuit damaging from reverse connection of battery
Tactical push-button tail cap switch
Made of durable aircraft-grade aluminum
Premium Type III hard-anodized anti-abrasive finish
Toughened ultra-clear double glass lens with anti-reflective coating
Notice: The above-mentioned parameters (tested by 2500mAh Ni-MH battery in Lab) are approximate and may vary between flashlights, batteries, and environments.