Fenix ARB-L16-700UP Built-in USB 16340 High Load Rechargeable Battery

The Fenix ARB-L16-700UP 16340 lithium-ion battery is specifically designed for high-current, high-drain devices and makes a great accessory addition for all current Fenix 16340 (RCR123) powered lights. The benefits of using this battery in Fenix high-drain devices are simple: they will last longer at their peak performance levels by maintaining a higher voltage. It also includes a protection circuit in the anode to help prevent short circuits, overcharge and discharge, and overheating. This battery can be quickly charged without the need for a separate charger via its USB port.