KK-SPORTS Replacement Battery Pack for Cree Headlamp and Bicycle Bike Light (8-cell) Replacement 8800mAh 8.4v Battery Pack for Bike Light Headlamp Bicycle Head Torch Consists of 8* 18650 batteries Please make sure that the socket/pin is suitable with the one in the picture Dispatch by Royal Mail, usually arrive in 7-10 business days