This lithium-manganese dioxide has a shelf life of 5 years and a life of 4 years or 200 shocks when installed (standby mode). It is compatible with defibrillators Philips HeartStart Onsite and FRX . Single battery, and easy to install. ATTENTION! the date on the battery is a date ”install before” and not an expiration date.The service is included with the purchase of this item.