A little hard to operate with all the settings on one button.

I was really excited in this refined-looking 21700 flooder with good runtimes. The batteryjunction.com page says: * Turbo mode is measured in total runtime including step-downs. I'm giving this 1-star because not only Turbo mode steps down, but also High mode (2000lm) as well. This light has both timed and temperature based step downs. So even though High(2000 lm) might be running cool, it will step down after 7 minutes to 20% output regardless. The maximum sustainable output for this light, then, is Medium ~ 500lm. Now its not so impressive.

This is my second one of these, this one being updated and even brighter. Side button lights are easier to control but only if there is a clip that is 180 degrees to the switch like this one. My other lights make it a roulette chance of finding the switch in the dark. The one button control make it easy to control. The fit and finish are excellent. The beam has a wide pattern. This is probably my favorite light.

A solid handy size light with plenty of output. I bought two and have recommended to friends already. They were impressed when handled and used at night.

I am pleased with this flashlight, except for 3 problems. It's a proprietary battery and there's no tail switch. Third; the head gets very hot, in high and turbo modes, making it very hot to change modes with the placement of the side switch being so close to the head of the light.

I usually do not write reviews but I felt I had to. For G15V2 This is a bad joke, the specs say the turbo run time is 3 Hrs. When onTurbo it lights up at 4200 Lumens but in about 25 seconds it dims to about 2000 Lumens. To me this is false advertising. What is the use of 4200 Lumens if for only 25 seconds, very disappointed in this flashlight.

Used the first Klarus G15 on some long graveyard shifts last year and I'm glad I could get my hands on this version. This one definitely lasts longer. Thank god it can charge my phone, I'm running around a lot and can't always sit to charge. This is a real game changer.