I just sat down at the keyboard, with a Nightwatch NSX53vn in one hand, and Lumintop FW21Pro Vn in my other hand. Also, Astrolux EC03 is in this class. I like these three so much that I bought two NSX53vn, three FW21Provn, and three EC03. I gave two new FW21Pro vn to friends.
I have three other single 21700 lights, but one is built in cell, and two others are designed for protected 21700, so unprotected cells need a large solder blob to work all good. TM9K, E4K and MS03.