Replacement battery for Philips HeartStart FRx, OnSite HS1, and Home AED defibrillators — 9V 4.2Ah Li‑MnO₂ (37.8Wh), non‑rechargeable, direct replacement for OEM M5070A. Up to 4 years standby life ensures AED readiness for cardiac arrest response. CE, RoHS, UN38.3 certified.
