Your link is broken. However, that's fine, since the battery the laser comes with seems to work just fine. I only have one cycle on it so far, but I have yet to drain it completely. (probably because my laser is not pulling the current it is spec'd to pull) :mad:
The one you linked to seems quite well built. The tail cap seems like it may be too loose to be submerged, but I have not tried it, and I am sure a new o-ring would fix that.
Can someone that has this laser measure the tail cap current? I just got mine, and it doesn't burn... At all. I measured the tail cap current to be ~260mA. :wtf: