Klarus E2 Review: Can it run for 7 days?

This is the Klarus E2, an aluminum-bodied EDC wilderness survival flashlight is scarcely bigger than the 18650 battery that powers it. With a max output of 1600 lumens and at low power, a max runtime of 168hrs (in my testing it fell short by 54hrs). Let's take a look at what you get for a street price of about $70.