Excerpt: Body: The battery tube has really thick walls. Much thicker than any other AA cell light. Of course this also means that its slightly heavier than most AA lights, and about 3/4cm to 1cm longer. There're four flat faces machined onto the tube.
Pros: Very well built and finished. Provides a well-focused spot while still having a smooth, artifact-free spill beam. Maintains regulation nicely with AA or 3.7V 14500 cell while providing good output and runtime even on the brightest level.
Cons: Slightly longer than most single AA powered lights.