I ordered one of these lights and received it about 8 days ago and it is Awesome! I would Highly Recommend it to Everyone! The Ring turns clockwise to increase the Brightness Level which is Just like the Rotary Ring Model they stopped making. The entire Head Unsrews from the Battery Tube, or Body.
If it came with a .50”-.75” Longer Battery Tube, it would work with a Longer and Larger Capacity Battery like the 18650 inside the Tube of another flashlight I have. Although they aren’t the same thread pattern?