I guess to clarify a little more - the P+18650 is the thinnest 18650 mechanical PV out there, and while not the shortest due to the button mechanism, still well within a reasonable length compared to what else is out there. Also, due to the machining, it's actually very light as well. Compare it to something like a silver bullet, and it is way smaller and lighter, even though the SB is made out of a lighter material (aluminum).