The Physio-Control LIFEPAK CR2 Lithium 4-Year Battery is a reliable and long-lasting power source for your LIFEPAK CR2 AED. This battery is designed to deliver power and performance for your Physio-Control LIFEPAK CR2 AED. With a lifespan of up to 4 years, this battery provides a dependable and durable energy source for your LIFEPAK CR2 AED, minimizing the need for frequent replacements and reducing maintenance costs.