This genuine Physio-Control LIFEPAK CR2 battery is a must-have for anyone in need of a reliable power source. With its lithium chemical composition, this battery is sure to last long and provide efficient power to your devices. It is a single use battery, perfect for emergency situations and medical equipment. This battery comes brand new and boxed, ensuring that it is in perfect condition for use. Its size is CR2, making it compatible with a range of devices. Don't miss out on this essential battery and make sure you have it on hand when you need it.