The Philips HeartStart battery (model number M5070A) has an operating time of 4 hours or a minimum of 200 shocks. The shelf-life of this battery is five years, and it is guaranteed to last four years from the time of installation.
Battery type: 9 VDC, 4.2 Ah, lithium manganese dioxide. Disposable, long-life primary cell.
Battery capacity: minimum 200 shocks or 4 hours of operating time
Shelf life: (prior to insertion) A minimum of 5 years from date of manufacture when stored and maintained according to directions provided in this Owner’s Manual.
Battery Standby Life: Four years typical when battery is installed by the install-by date.
Training life: Supports 10 hours of use in training mode.