Is there a difference between the tailcap on the light and the one pictured in the center, or is it just an extra?
Excellent question! Actually there is a difference. Some of the 123 batteries are ever so slightly shorter and did not work so well with the one that came with the light. This was a known "issue". Some guys were using foil to "fix" the problem. However, there were some early tailcaps that worked better. I was fortunate to be able to get one, so I didn't have to be concerned about which batteries worked and which ones didn't.
Also of note, the one tailcap is ever so slightly larger in diameter than the one that came with it. The "clicky" tailcap seems to work fine no matter which battery you use.
Again, excellent question.

Mike
« Last Edit: October 28, 2008, 07:08:46 PM by mike »
Common sense ..... so rare, it's virtually a super power.