Waterproof 8.4V 11000mAh Rechargeable 2-in-Series 5-in-Parallel Li-ion 18650 Battery Pack
Power supply for bicycle light or headlamp Charging time: 7~8 hours; Universal for Cree XM-L T6 / L2 / U2 / Z7 / R5 bulb headlight or bicycle light; Provide high mode light 6 hours for 4 x CREE XM-L T6 and high mode light 12 hours for single CREE XM-L T6 or SSC Z7 bulb