Golfing Buddies CR2 Batteries Bundle One CR2 Recharging Station Two CR2 High Performance Batteries Use with popular laser rangefinders including Bushnell, Leupold, Golf Buddy, Nikon, Vortex, Redfield, Opti-Logic, Zeiss, Steiner, and Halo Additional Uses: Golf Rangefinders, Flashlights, Cameras, and Binoculars Approximately 4 hour charge time, and 18 hour use time in a laser range finder