I got a 2AA today,..the headlamps were sold out at my store. This thing is nice and beefy. Next to my Fenix TK20, it has the same chunky feel, thick battery tube, is about 1/4" longer ( 6 1/2"), and has the same type of beam, with a tight hotspot and good spill. I lubed the threads and contacts with CRC-226 and it's nice and smooth. GREAT for $15- and will definatly get a headlamp asap! Its daylight now, so I will have to wait for dark to get a better comparision of this and the Fenix. This will probably live in the driver's door pocket of my car, fueled by Energizer L91 liths for good shelf life and cold weather performance.