Philips HeartStart Battery M5070A

Probably yes. The Philips FRx and OnSite chirp at low battery roughly 30 days before full depletion, then continuously when the battery requires immediate replacement. The status indicator on the device front will also flip from green to red. Order an M5070A replacement, install per Philips instructions, and the beeping stops. Don’t ignore the alert — a dead battery means no rescue capability. Average M5070A cost is ~$189; install life from a fresh install is 4 years.

Yes — M5070A is the only Philips refill SKU that genuinely cross-fits two device families. Same battery works in the HeartStart FRx and the HeartStart OnSite (HS1). This is unusual in the AED accessory landscape — most batteries are device-specific. For mixed Philips fleets running both FRx and OnSite, the shared battery dramatically simplifies refill procurement and inventory. One battery SKU covers both devices on the same 4-year refill calendar.

Yes — 4 years installed life is the rated lifespan from the install date (not manufacture date). The device runs self-tests daily, weekly, and monthly that incrementally drain the battery. After 4 years, the remaining capacity drops below safe rescue thresholds and the status indicator flips red. Some operators see slightly longer life in low-use environments and slightly shorter in high-use environments. Plan for the 4-year cycle and replace promptly when alerted — don’t try to stretch beyond 4 years.

No — these are two different products despite the similar name. Standard M5070A is for ground-based FRx and OnSite units. FRx Aviation Battery (TSO-C142 certified) is for FRx units installed on commercial aircraft per 14 CFR 121.803. The Aviation variant is FAA-approved for in-flight use; the standard M5070A is not aviation-compliant. For airlines, only TSO-C142 is permitted. For ground-based facilities, the standard M5070A is the right choice at ~$189 vs ~$295 for the Aviation variant.