The Fenix ARB-L18-1600 18350 Battery offers a 1600 mAh capacity and boasts advanced safety features including overcharge and over discharge protection, short circuit protection, and overheat protection circuits. Its anode also includes a pressure relief valve, microporous protection, and PTC cathodal block protection. With a 7A maximum current, it is made with steel shell riveting technology. All Fenix rechargeable batteries are rated for up to 500 charge cycles and feature a 1 year warranty. Shipping Note: Lithium ion batteries are considered "dangerous goods" per US transportation regulations and can often only be transported via ground shipment. Orders containing loose batteries will typically take much longer than predicted to be delivered. Delivery times of 14+ days are not uncommon.