compact, very bright, unusual batteries

The light output of the lamp convinces. The lamp has 2 light cones: The first / inner cone of light is extremely strong bundled and so makes it possible to illuminate objects even 100 meters away. The second / outer cone is less concentrated and scatters the light more, which is useful for short distances to keep the focus (z. B. as one moves in the forest). The extreme light output, the lamp is used even as self-defense, as they extremely hidden potential attackers.
What the lamp is missing is a loop for securing a band, and a manually adjustable beam.
The price for such a handy flashlight is high, but still reasonable.
The biggest shortcoming is the unusual size CR123 battery, which you can not use commercial batteries. Therefore, "only" 4 instead of 5 stars