peccato che non ho ancora capito che tipo di batteria serve.

Very small for a 16850 light.
The cree q5 in conjuntion with the orange peel reflector offer a good amount of light with a surprising good trow and nice flood around.
Glow in the dark clicky switch, and can also tail stand.
Could use grip checkering, feels slick in hand.
Because of size and weight, it makes a great helmet light.