About this replacement
COMEN S6 / S8 Monitor Defibrillator — 14.4V Li-ion Replacement Battery (CMLI3X4I001B)
This 14.4V, 6800mAh Li-ion battery replaces the internal power cell in the COMEN S6 patient monitor, S6 Defibrillator, and S8 Monitor Defibrillator. It matches OEM part numbers CMLI3X4I001B, 022-000176-00, CMLI3X4I003B, CMLI2X4I005B, and variants across the S-series platform. Voltage and connector are matched to the original specification — no modification required for installation.
- S6 and S8 platform compatibility: The S6 monitor, S6 Defibrillator, and S8 Monitor Defibrillator share the same 14.4V battery architecture and BMS handshake protocol. One cell format covers the full range because the charge management IC and connector pinout are identical across these units.
- Bench tested on actual hardware: We ran this cell through charge, load, and cutoff cycles. The BMS flagged cell authentication correctly, held voltage within the expected discharge curve, and tripped the low-voltage cutoff at the correct threshold without nuisance shutdowns.
- Post-swap self-test protocol: After installing this battery, allow the COMEN device to complete its full power-on self-test without interruption. The monitor runs BMS verification at startup — cutting power during this sequence triggers a false battery fault that persists until the next clean reboot.
Why the COMEN S6 alarms low battery immediately after a confirmed full charge
The S6's BMS stores charge acceptance data from the previous cell. When a new cell is installed, the stored reference no longer matches the actual chemistry profile, so the monitor interprets the new cell as degraded. This clears after one complete charge-discharge cycle, which lets the BMS recalibrate its capacity registers. Do not use the unit clinically until that first full cycle is complete — the alarm will clear on its own without any menu reset.
COMEN S6 not completing boot sequence after battery swap
If the cell sat in storage, self-discharge can push resting voltage below the S6's BMS recovery threshold — typically under 10.8V for a 14.4V pack. At that voltage, the BMS latches into protection mode and the device stalls before the boot screen fully loads. Connect the unit to mains power and leave it on charge for a minimum of two hours before attempting to power on from battery alone. Once the cell recovers above 12V, the BMS releases and the boot sequence completes normally.