2450 lithium coin 3V battery. Delivers long-lasting, dependable power for your coin-battery-operated items. From heart rate or glucose monitors, to remotes, keyless entry systems, key fobs, watches, toys and games, and even more specialized devices, our coin batteries are compatible with the devices that fit your life, so you can keep going. These reliable and durable batteries are able to withstand a wide range of temperatures, (from -22 to 140 degrees Fahrenheit) and can hold power in storage for up to eight years, giving you coin battery power you can depend on. Responsibly designed with zero mercury.