Our most efficient lithium battery: The Energizer CR2016 Ultimate Lithium coin cell with 3 volts reliably powers devices. Whether it's heart rate monitors, blood glucose meters, remote controls, keyless entry systems, key fobs, watches, games and toys, or even more specialized devices – these batteries are compatible with the devices that are part of your life, ensuring they keep running. The durable Energizer lithium coin cells are suitable for a wide temperature range (from -30 to 60 ºC) and provide reliable performance even after up to 10 years of storage. The environmentally friendly batteries contain no mercury and are packaged in child-safe packaging. Therefore, Energizer coin cells are the perfect choice for your specialized devices.