Product description Feature of Hixon RCR123A Li-ion rechargeable battery 700mAh 3.7V rechargeable Li-ion battery No heavy Hg/Cd/Pb metals included Environment friendly Better Circle life, up to 500 rechargeable cycles Safely Performance - Over charge protection - Over discharge protection - Over current protection - Short circuit protection Applications Works with Arlo Wire-Free HD Security Cameras; Reolink Argus HD Outdoor Wireless Battery-Powered Security Camera; LED Flashlights use 3.7V BATTERIES（Fit Olight S2）; Don't take your risk for using on your 3.0V streamlight flashlight; Dog Collars; Lasers; Most Flashlights (that can use RCR123A batteries); Alarms; Cameras; And More... Package Contents 4/8/12/16/20 Li-Ion Rechargeable RCR123A Batteries(By your Choice) 1-2 Battery.