Night Eyes DC 8.4V Rechargeable Battery Pack for Bike Light & Other Bicycle Light Spare Replacement 4x18650 (6400mA or 8800mA) Powerful New Design ABS Water Proof Bike Light Battery Pack with 6400mA High Capacity. 8.4 Volts DC Plug for Charging LED Bike Light, Keep High Power and Bright Visibility for LED Bike light Waterproof & Safety: ABS High Quality Waterproof Case to protect your Battery by 100% in Well Condition High Power: 6400mAh Capacity to Keep Long Lasting Ride, It can Keep About 3 Hours or above for 1200 Lumen Bike Light in High Mode ORDER WITH NO RISK, 100% SATISFACTION GUARANTEE - If you are not completely satisfied,that we offer 30 days Money Back or New One Replacement, One Year Warranty Available!