Gugou US Plug Adapter 8.4V 18650 Battery Pack Charger for X2 X3 cree T6 LED Headlamp Bicycle light Bike lamp 8.4V Li-ion Charger for most bike light or 18650 battery pack Li-ion Charger for CREE XML T6 Bulb LED Bicycle bike HeadLight Rechargeable Battery Pack Headlamp and Bicycle light Charger,Interface Size: DC5.5*2.1mm When it is charging for battery pack and the power consumption is not full,indicator lamp appears red, and when the battery pack is full, it appears green. 100% Satisfaction Guarantee and NO hassle 90-day Money Back Guarantee!