The Philips Lithium Battery Pack is the replacement disposable lithium manganese dioxide battery for your Philips HeartStart FR2 or FR2+ AED. This battery pack has a shelf-life of up to five years from the date of manufacture so having an extra battery on hand is always a good idea. This Philips battery pack will last up to five years in your FR2 or FR2+ and it comes with a four-year manufacturer’s warranty. According to performance data from Philips, a new FR2/FR2+ Battery Pack should provide up to 300 shocks or 12 hours of patient monitoring capability. (M3863A)