OEM Duracell PROCELL General Purpose Battery, packaged with 12 batteries per box. These batteries are rated for reliable operation and contain no added mercury, making them a safe choice for various applications. They can withstand temperature extremes from -20 degrees C to 54 degrees C, making them ideal for use in infusion pumps, smoke alarms, and security backup systems. Dependable even after 10 years of storage, these batteries ensure you have the power you need when it matters most.