The Lithium Battery CR1620 is a type of lithium primary cell battery. It is coin-shaped and is commonly used in small devices such as calculators, car keys, and other portable electronic devices. They are known for their long shelf life, low self-discharge rate, and ability to operate in a wide range of temperatures. They are also a cost-effective alternative to other small batteries. They are widely available and can be found in most electronic stores and supermarkets. The CR1620 batteries are commonly used in small portable devices, remote controls, and other equipment that requires a small and reliable power source. They are a convenient and easy-to-find option when you need to replace batteries in small devices.