Philips Heartstart FR3 10.8 volt 4.5 Ah Li-ion battery

The Philips FR3 Lithium Battery is the replacement disposable lithium manganese dioxide battery for your Philips HeartStart FR3 AED defibrillator.

This battery pack has a ca. 5 years shelf-life from the date of manufacture so having a spare battery on hand is always a good idea. 
This Philips battery pack will last up to 3 years in your FR3 and it comes with a ca. 3-year manufacturer's warranty. 
According to performance data from Philips, a new FR3 Battery Pack should provide up to 300 shocks or hours of patient monitoring capability.