The CR123A battery is a primary lithium battery widely used in various electronic devices, including flashlights, cameras, and medical equipment. Known for its high energy density, long shelf life, and reliability, the CR123A battery is a popular choice for industries that require dependable power sources for critical applications. Whether in the military, law enforcement, medical, or industrial field, the CR123A battery is a reliable and efficient power source. The CR123A battery is a cylindrical-shaped lithium primary battery with a diameter of 17mm and a length of 34mm. It is slightly larger than a standard AA battery.