About this replacement
Philips Effica CM100 / Efficia CM150 Series — 10.8V Li-ion Replacement Battery (ME202C)
This is a 10.8V, 7800mAh lithium-ion replacement battery for the Philips Effica CM100, Efficia CM120, and Efficia CM150 portable defibrillators. It carries OEM part number ME202C and matches the original voltage rail, connector pinout, and BMS communication protocol these units expect at startup.
- CM100 / CM120 / CM150 platform: All three models run the same 10.8V battery architecture and share an identical dock connector with BMS handshake. One cell fits the entire platform without adapter or modification.
- Bench tested on actual hardware: We cycled this cell through the CM-series startup self-test sequence. The BMS authenticated correctly, charge registers were accepted by the charge IC, and no fault codes were thrown on the first boot.
- Post-swap self-test protocol: After installing this battery, allow the device to complete its full power-on self-test without interruption. Cutting power during BMS verification locks in a false battery fault that persists across subsequent boots until a clean full-power reboot clears it.
Device not completing boot sequence after battery swap
The Efficia CM series runs a BMS learn cycle on the first boot with a new cell. If the battery's state-of-charge registers below the device's internal readiness threshold — typically around 20% — the unit will stall mid-boot and display a battery fault rather than reaching the ready state. This is a protection behavior, not a hardware fault. Charge the battery to full before the first installation, then allow the complete boot sequence to run uninterrupted. The device should clear its own fault and reach standby ready status.
Low battery alarm triggers immediately after a confirmed full charge
This happens because the CM-series BMS applies a conservative capacity threshold tuned to aged OEM cells. A new cell with a different internal resistance profile can register lower than actual on the first read cycle. The alarm clears after one full charge-discharge cycle, which recalibrates the fuel gauge register to the new cell's actual chemistry. Run one complete cycle — charge to full, allow the device to draw down under supervised conditions — before placing the unit back into clinical rotation.