Duracell CR2016 Coin Lithium Batteries are long-life guaranteed for your specialty devices. Suitable for use in key fobs, small remotes, fitness watches and other wearables, scales, sensors, medical devices {glucometers, digital thermometers), sports devices {heart rate monitors, bike accessories). Lastly, with up to 10 years in-storage guarantee, you can be confident they will be ready when you need them.