Dont let their small size fool you. Energizer 2430 Lithium Coin 3-Volt Battery delivers big time on 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 they are compatible with the devices that fit your life so you can keep going. These reliable and durable Energizer Coin Lithium Batteries are able to withstand a wide range of temperatures from -22 to 140F and can hold power in storage for up to eight years giving you coin battery power you can depend on. With zero mercury and child-resistant safety packaging to keep your little one safe its easy to see why Energizer Lithium Coin Batteries are the right choice for your specialty devices. Battery Type: Lithium Coin Battery Size: 2450 Voltage: 3 V Materials: Silver-Oxide Zinc.