COMEN Star 8000 Compatible Battery 10.8V 3400mAh 022-000084-00

Cardiomonitor COMEN Star 8000 / Star 8000 E — 10.8V Li-ion Replacement Battery (022-000084-00)

This is a 10.8V, 3400mAh (36.72Wh) lithium-ion battery for the COMEN Star 8000 and Star 8000 E patient monitors. These monitors display ECG waveforms and vital signs in clinical observation settings. This battery slots into those units as a direct cell replacement when the original pack degrades or a backup unit is needed for continuous monitoring.

• Star 8000 and Star 8000 E compatibility: Both models use the same 10.8V three-cell Li-ion pack configuration and share the same BMS handshake protocol. The connector pinout and charge IC communication line are identical across both variants, so a single battery SKU covers the pair.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a COMEN Star 8000 unit. The BMS completed its verification sequence without fault flags, accepted charge to full capacity, and maintained stable output voltage across the monitor's normal load profile.
• Post-swap self-test requirement: After installing this battery, allow the monitor to complete its full power-on self-test without interruption. Cutting power during the startup BMS verification sequence triggers a false battery fault that persists until the next complete reboot — it is not a cell defect.

Device not completing boot sequence after battery swap

The COMEN Star 8000 runs a BMS learn cycle during its first few charge-discharge sequences on a new cell. A new battery that has not completed this cycle may cause the monitor to stall mid-boot or flag a battery error on the status screen. This is not a fault with the replacement pack — the charge IC is applying conservative limits while it characterises the new cells. Run one complete charge-discharge cycle before placing the unit into clinical use, and the boot sequence will complete normally on subsequent power-ons.

Low battery alarm triggers immediately after a confirmed full charge

This alarm fires when the BMS threshold check runs at startup and the new cell's state-of-charge reading sits below the OEM calibration reference — not because the battery is actually low. The monitor's charge IC stores a learned capacity baseline from the previous pack, and a new cell won't match that baseline until it has completed one full cycle. Charge the battery to 100%, allow the monitor to run until it reaches approximately 10.8V under load, then recharge fully. After that conditioning cycle, the alarm clears and the charge gauge reads correctly.