Klarus is at it again bringing you an extended USB Mini Charger for the ST2C flashlight. This compact and lightweight charger screws on easily and directly replaces the head of the ST2C. Used for in-torch recharging of the Li-Ion batteries using any USB port (5V/500MA output required). This amazing accessory features three different charging modes (CC, CV and Trickle Charge), the charger automatically stops charging when complete. Charging indicator lights are located at the top to ensure easy reference.Features: Charging cap replaces the head of the ST2C Compact and Lightweight design. Easy-carry screw-on charger for the ST11 Torch Used for in-torch recharging of Li-Ion batteries Reverse polarity protection Micro-USB to standard USB cable supplied Can be used off any USB port (5V/500MA output required) Features three charging modes (CC, CV and Trickle Charge) Automatically stops charging when complete (4.2V cut-off) Charging Indicator lights for easy reference (red and green light) Weight: .51 oz. (14.6g)