Progetti Rescue Sam Defibrillator ELRS-002 12V Replacement Battery

Progetti Rescue Sam Defibrillator — 12V Li-MnO2 Replacement Battery (ELRS-002)

This is a 12V, 4200mAh Li-MnO2 replacement battery for the Progetti Rescue Sam AED. It carries OEM part number ELRS-002 and fits directly into the Rescue Sam Defibrillator. Li-MnO2 chemistry is standard for this device class — it holds a stable discharge curve under the high-current pulse loads AEDs produce during shock delivery.

• Rescue Sam AED platform fit: The Rescue Sam uses a 12V Li-MnO2 cell with a specific connector pinout and BMS handshake that confirms battery status during power-on self-test. This battery matches that voltage rail and connector so the device can complete its startup sequence and report battery state correctly to the unit's monitoring circuit.
• Bench tested on actual hardware: We cycled this battery through a simulated AED load profile — capacitor charge cycles at representative intervals. The BMS held voltage within spec across each charge event and did not trigger low-battery cutoff during the sequence.
• Post-installation self-test protocol: After fitting this battery, do not interrupt the Rescue Sam's power-on self-test cycle. The device runs a BMS verification routine at startup. Cutting power mid-sequence can lock in a false battery fault that the unit will continue reporting until a full power cycle clears the flag.

Why the Rescue Sam reports a battery fault on a new cell

The Rescue Sam's BMS applies charge thresholds calibrated to an OEM cell that has already completed at least one full charge-discharge cycle. A new Li-MnO2 cell arrives with a resting voltage that sits inside the acceptable range but has not yet built the charge profile the BMS uses to validate capacity. On first installation, the device may flag a low-battery warning even though the cell is not depleted. Running one complete charge cycle after installation allows the BMS to map the new cell's voltage curve and clear the fault.

Rescue Sam not completing boot sequence after battery sits in storage

Li-MnO2 cells self-discharge slowly during storage, but the Rescue Sam's BMS sets a minimum recovery voltage — typically around 10.5V — below which it will not attempt to boot. A battery stored for an extended period may have dropped under this threshold. Connect the battery to the charger before installing it in the device and allow a full charge cycle to bring cell voltage above the BMS recovery floor. Once voltage is restored, the unit will complete its boot sequence normally.