WINDFIRE 8.4V 11000mAh 10 x 18650 Rechargeable lithium ion Replacement Spare Battery pack Set for Cree LED XM-L T6 Bike Bicycle Light or headlamp Head Light Flashlight Lithium Ion 18650 rechargeable battery pack. Capacity: 11000mAh. Color: Black. Made of 10 x 18650 cells with PCB and poly switch for full protection Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time. Replacement battery pack for Bike Light Headlamp Bicycle Head Torch. This 11000mAh rechargeable battery pack, easy to carry and use, would make your travel life more convenient.