I train people to shoot and I use a weapon laser to help teach trigger control. My batteries die quickly with all the use. But these are lasting much longer than I expected. I might even drive the cats *laser* crazy once in awhile. Of course, while practising superb muzzle awareness and only after taking the laser off the pistol; don't want to shoot one of the wife's kitties by accident ;/

I have ordered these twice. The first time the batteries were excellent. Four batteries lasted me about two years in my Crimson Trace laser. The last pack I bought a few months ago and I am already on my third battery. STEEP STEEP decline in quality. I am switching back to Duracell.

Update. I bought some Duracells and tried them. Same issue. It appears my Crimson Trace laser has decided to malfunction.

I ordered these batteries because I cant seem to find them anywhere in the Richmond area (very popular battery, sold out everywhere). I just should have ordered the Streamlight batteries for my TLR-6 Laser because once I got these batteries, I had to take the green viridian plastic around the batteries off in order for the batteries to work properly (kind of a pain to get off). I figured I got 4 batteries for the price of 2 from Streamlight tho. The batteries work just fine. Will definitely order again if I get a Viridian laser.

Be sure to rip off the green shrink wrap that's on each of the batteries. If you don't, it may not contact and thus, not providing any power. I use this on my Streamlight TLR6 which uses two of these, stacked. I initially dropped the two batteries in, with the shrink wrap. The TLR6 didn't turn on. I took the batteries out and looked at it for a few seconds and realized that the shrink wrap was preventing the two batteries from making contact with each other. I ripped the green shrink wrap off and it worked. Affordable, quality batteries.

Great price for a 4 battery pack. I have an Elcan M145 scope with illuminating reticle, but had a very hard time finding what battery it used and where to get them. Amazon to the rescue! I found the batteries at a battery specialty store, but was shocked at the price for just one. This four pack (including shipping, etc) cost less then just one at a store. I did have to do a little troubleshooting to get the reticle to light up. The green rubber jacket around the battery had to be trimmed off of the top and bottom in order to make good contact in the battery compartment. I removed all of the rubber jacket from one of the batteries. It worked well, but was a little loose in the battery pocket. I trimmed just the top and bottom on another battery and that did the trick. Shooting long distance in daylight has never been a problem for me, but only very short distance at night. These batteries allows me to use the Elcan scope to it's full potential. Now I can hit targets at night at 800 meters or more. Very long battery life too. I've been using the first battery for almost 50 hours and it's just as bright now as when I first turned it on.