the 3xAAA should be the V6:
the 3xAAAA is the V10 Power Chip:
those are stainless steel lights with battery holders. The V6 is not a too good quality whereas the V10 is nice ... BUT I'd not advise to buy either of them since there are too many drawbacks. The V6's threads are wobbly and the (Fraen) optix unprotected, the V10's optix are unprotected, too, but worst of all, to turn it on you have to rotate the bezel, and try that on a non-knurled light with a rather stiff turning action! not too cool. In addition to that they are not waterproof.
read more
here and have a look at beamshots, too. The V10 uses an optix similar to the Fraen LP with a very narrow beam with almost no sidespill.
KLaus, I'd very much like to know more about this 2x123 light you mentioned ... correct information about LedLensers is very hard to come by, I do not have a reliable source right now. Do you?
Thanx!
bernhard