Heads up if you have the Lasermax 10/22 laser. I replaced the battery in my laser. It was dim and then died at the range. It would not turn on after replacing the battery. I bought a new battery to verify that the replacement battery wasn't also dead. It still wouldn't turn on. I stretched the spring to make sure it was held securely against the contacts. As I continued to troubleshoot, I pushed on the battery from the spring side and the laser came on. It turns out that the plastic coating that they have around the battery was preventing the battery from making contact on the negative side. I trimmed off the plastic and all is good. The replacement batteries are the ones sold by Lasermax.