This is a high-performance replacement battery for the ULTRAFIRE 18650 BRC RECHARGEABLE.  The battery is 2.69 x 0.71 x 0.71 inches with an output of 3.7 volts. The chemistry is LI-ION at 4200mAH capacity. Manufactured by Ultrafire, model number FLB-18650-4.0. We offer a 1 Year Warranty with purchase. 

Minimum order quantity 2 Batteries

Compatible with most 18650 based lighting tools(as headlamp ,flashlight ,laser pen,