The Duracell MN21 A23 Alkaline Batteries are 12V batteries with the longest expiry date, making them ideal for a variety of applications such as fishing bite alarms, keyless fobs, wireless remote controls, and more. With a unit quantity ranging from 2 to 6, these batteries are designed for long-lasting power and reliability. Manufactured by Duracell in Belgium, these batteries are suitable for a range of devices with low to high drain requirements, providing a consistent and stable power source for your convenience.