The Fenix ARB-L18-3400U USB rechargeable lithium-ion battery features a built-in USB port to charge without the need for an external charger, though one can be used if desired. Its anode circuit is specially encased in a steel housing, reducing the risk of short-circuiting from impact or collision due to the fully wrapped steel construction.

Note: This item is packaged and priced as one unit - one battery. 

Shipping Note: Lithium ion batteries cannot be shipped via expedited shipping service due to shipping carrier restrictions. Orders that include lithium ion batteries that aren't included in lights they are meant to power will be shipped via UPS or USPS ground service.