https://rumble.com/vbtsuh-klarus-e2-review-can-it-run-for-7-days.html
The Klarus E2 is 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.
AMAZON LINK: https://amzn.to/36NhetZ