Philips ME202C Efficia CM10 Compatible Battery 10.8V 7800mAh

Philips Efficia CM10 / CM12 — 10.8V Li-ion Replacement Battery (ME202C)

This 10.8V 7800mAh Li-ion battery replaces the ME202C in the Philips Efficia CM10 and CM12 portable cardiac monitor-defibrillators. It fits the standard battery bay without modification. Capacity is rated at 84.24Wh — matching the OEM specification for continuous clinical operation.

• CM10 and CM12 compatibility: Both models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The CM12 adds expanded waveform analysis, but the power rail and charge circuitry are identical — the same ME202C cell runs both platforms without adjustment.
• Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on a CM10 unit. The BMS accepted the cell without fault codes, completed capacity verification, and held the charge curve within OEM tolerance. No communication errors appeared during the test sequence.
• Post-installation self-test cycle: After installing this battery, allow the CM10 or CM12 to complete its full power-on self-test without interruption. The device runs a BMS verification at startup — cutting power during this sequence triggers a false battery fault flag that persists until the next clean reboot.

Device not completing boot sequence on a freshly installed battery

The Efficia CM10 runs a BMS handshake during boot that checks cell voltage, internal resistance, and chemistry signature before clearing for clinical use. A new cell that has self-discharged during shipping may present a voltage the BMS interprets as a fault condition — even if the cell is otherwise healthy. Connect the device to mains power and charge the battery to full before attempting a standalone boot. Once the cell reads above the BMS recovery threshold (approximately 10.0V at rest), the boot sequence completes normally.

Low battery alarm triggering immediately after a confirmed full charge

This happens when the BMS compares the new cell's internal resistance profile against the threshold calibrated for a conditioned OEM cell. On the first cycle, a fresh Li-ion cell has not yet settled its electrochemistry, so the resistance reading sits slightly above the OEM baseline — the device flags this as a capacity concern rather than a true low-charge state. Run one complete charge-discharge cycle outside clinical use. After that cycle, the BMS updates its reference values and the false alarm clears. Do not deploy the battery for emergency use until this conditioning cycle is complete.