The Fenix ARB-L14-2200U is a high-capacity 14500 rechargeable lithium-ion battery designed as a reliable, long-lasting alternative to standard AA alkaline batteries. Featuring a built-in USB Type-C charging port, it offers convenient recharging without the need for a dedicated external charger. With a stable 1.5V output and a 2200mAh capacity, this battery is ideal for high-performance flashlights and other everyday devices. It is equipped with an advanced protection circuit in the anode to prevent overcharging, deep discharge, and short circuits, ensuring safety and durability.