This long life lithium battery lasts approximately 4 years and does not require recharging.
How long does a Philips AED battery last?
Quick Reference AED Pad Life Expectancy Guide Philips: Philips HeartStart OnSite AED batteries have a life expectancy of four years. Physio-Control: Physio-Control LIFEPAK AED batteries have a life expectancy of approximately three years.Oct 1, 2018