The China Lithium Battery CR2 is a type of lithium primary cell battery. It is cylindrical in shape and is commonly used in high-drain devices such as cameras, flashlights, and other portable electronic devices. The CR2 battery has a nominal voltage of 3 volts . They are known to have a good performance and reliability, and can withstand a wide range of temperatures. They also have a long shelf life of up to 10 years. CR2 batteries are commonly used in portable devices, small medical devices and other equipment that requires a reliable power source. These batteries are a convenient and easy to find option when you need to replace batteries in high-drain devices.