Philips Effica CM100 Replacement Battery 10.8V 7800mAh RRC2020

Philips Effica CM100 863300 — 10.8V Li-ion Replacement Battery (RRC2020)

This 10.8V, 7800mAh lithium-ion battery replaces the OEM pack in the Philips Effica CM100 and Efficia CM120 series portable defibrillators. It fits the 863300, 863301, and 863302 variants, as well as the broader Efficia CM120 platform. The cell format, connector pinout, and BMS handshake match the RRC2020 and RRC2020-L OEM specifications.

• Effica and Efficia CM-series compatibility: The CM100 and CM120 platforms share the same battery bay geometry, voltage rail, and BMS communication protocol. A single RRC2020-format pack covers both series because Philips standardised the battery interface across this defibrillator family when the CM120 launched.
• Bench tested on actual hardware: We cycled this pack through a full charge-discharge sequence and monitored BMS handshake behaviour at startup. The pack passed the device's internal self-test without triggering a battery fault flag, and charge termination occurred correctly at the expected cell-level voltage.
• Post-swap self-test protocol: After installing this battery, do not interrupt the device's power-on self-test sequence. The Effica CM100 runs a BMS verification routine at boot that checks cell chemistry against stored OEM thresholds. Cutting power during this window causes the device to log a persistent battery fault that does not clear until a complete reboot from a full-charge state.

Why the Effica CM100 may not complete its boot sequence on a new battery

The CM100's BMS stores a learned charge profile from the previous pack. When a new cell is installed, the device compares the incoming voltage signature against that stored baseline. If the new cell arrived at a lower state of charge than the OEM pack it replaced, the BMS can stall mid-boot waiting for a voltage value it does not receive. Charge the replacement pack fully before first installation — target the device's charge-complete indicator, not a timer — then install and allow the full self-test to run without interruption.

Charge indicator not reaching 100% on the first charge cycle

On the first charge after installation, the Effica CM100 charge IC applies a conservative current limit to an unrecognised cell until it completes one full charge-discharge cycle. This is normal behaviour and not a fault with the battery or charger. The indicator may plateau below 100% and stay there until the BMS has logged a complete cycle. Run one full charge to completion, discharge the device through normal use or a supervised test cycle, then recharge — the indicator should reach 100% on the second charge.