The Fenix ARB-L18-3400U V3.0 is a high-capacity 18650 Li-ion rechargeable battery designed for reliable, long-lasting performance in high-intensity flashlights and other compatible devices. Featuring an integrated USB Type-C charging port, this battery offers ultimate convenience by allowing direct charging without the need for a separate dedicated charger. Engineered with advanced safety features, including a protection circuit in the anode and pressure relief vents, it effectively prevents short circuits, overcharging, and overheating, ensuring safe operation. With its 3400mAh capacity, it provides extended runtime for your essential lighting tools.