Nightstick Dual 18650 3400mA Rechargeable Lithium-ion Batteries w/ External Charger & Cable

This portable micro-USB external single battery charger is designed to recharge a non-proprietary 18650 lithium-ion rechargeable battery (4700-BATT). A red/green LED voltage indicator light illuminates red when charging and green when fully charged. Not designed to be operated in a hazardous environment. 2' micro USB cord included.