Fenix 14500 battery

ARB-L14-1600U is a high capacity 14500 Li-ion rechargeable battery with a built-in micro-USB charging port.

It also includes a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating.

This battery can quickly be charged without the need for a separate charger.

This not only save you money from purchasing a separate charger, but also convenience of not having to carry around another device. 

Will work in all of the models that utilize the standard AA battery.

A great rechargeable alternative to alkaline AA battery.