ePathDirect 1 X Replacement 8.4V 6600mAh Rechargeable Battery Pack for Headlamp & Bicycle Light BESTSUN Replacement battery pack for Bike Light Headlamp Bicycle Head Torch. High Capacity, Take Longer Rides : 6600mAh (For Standard Battery Use) , This Battery Pack is Made with 6 x 18650 batteries. 8.4 Volts DC Plug for Charging LED Bike Light, Keep High Power and Bright Visibility for LED Bike light. Save Time & Frustration : Straps On In Seconds (No Tools Required). Convenient to carry, Suitable for bike light