Viridian CR 1/3N Tactical Energy Plus Lithium Batteries, 3 Volt (Retail Pack of 4)

The shelf life is 15 years and my battery came 2 years old and still strong. These batteries last a long time in gun sights.

They work

Perfect replacement. At first, it didn’t work, but I had to remove the green plastic cover. It’s a great battery for a great price.

As others have noted, the green insulating sleeve covering these batteries is annoying. One might think that the package would have some note explaining why these don't work like everyone else's batteries. There's plenty of space on the back of the package; all they'd have to do is make the blurb telling us how super-fantastic the product is a little bit smaller. Then there'd be room to squeeze in some useful information about the green insulator. But such is not the case. Taking off the plastic could be a challenge to anyone who's a bit of a maladroit, as the battery is small and slippery, and hard to hold onto while juggling a sharp knife. Anyway, once safely held, cut off a slice of the green stuff, just like peeling a potato. One cut should do it; fingernails should suffice from there on to pull off anything green. The real annoyance here is a bit more subtle. Equipment powered by these sorts of batteries generally have battery compartments with nasty little covers. The covers are small and have even smaller tabs and catches sticking out the sides, as well as ridiculous little screws holding the whole thing together. When - not "if" - these plastic parts fail, or the little screws go AWOL, the product will be functionally dead. Now, in this case I had to open the battery compartment, take out the old dying battery, and put in this new one. No function. So I open the compartment again, take out the new battery, flip in around, put it back in, and screw the cover back on the compartment. Still no function. So I open the compartment again, take out the new battery, put the old one back in, and attach the lid. This time the thing works. So, open the compartment, take out the old battery, put in the new one, and button up the cover again. And it's back to non-functionality. So I then open the compartment, remove the battery, cut off the green insulator, re-install the battery, and test. NOW it works. This accounts for nearly a half-dozen open/close cycles for the battery compartment door. That might normally happen over, say, a two-year period. So two years of wear and tear on the battery compartment door were accumulated just changing this battery. This is a major deal because I strongly suspect that the useful lifetime of a product like a laser sight is determined by how long it takes the compartment cover to break or be lost. Once in and working, the batteries function as expected.

Strong battery that fits my needs.

PRODUCT JUST AS ADVERTISED AND DELIVERED PROMPTLY.

Worked perfect in LCR laser site.

These batteries do not last. I installed these in a handgun green laser - never turned it on in the two months it was in my safe. Took it out to test it and it was dead. This has happened twice. Poor quality, does not last, not recommended. And, as others have pointed out, the green plastic is a hassle to remove and batteries will not fit or will get stuck in device if plastic is not removed.

Todo bien gracias