Duracell 3V Lithium Battery is made with high-purity lithium. Much more than just watch batteries, Duracell coin and button batteries are also ideal for remotes, battery alarm clocks and many other devices. With guaranteed long-lasting power, Duracell coin batteries offer Duracell quality in a variety of sizes. These are suitable for use in key fobs, small remotes, scales, wearables, sensors, medical devices (glucometers, digital thermometers), sports devices (heart rate monitor, bike accessories).