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

COMEN Star 8000 / Star 8000 E / M2000A — 10.8V Li-ion Replacement Battery (022-000084-00)

This is a 10.8V, 3400mAh (36.72Wh) Li-ion replacement battery for the COMEN Star 8000, Star 8000 E, and M2000A patient monitors. These are portable clinical monitors used for continuous vital signs surveillance in wards, ICUs, and surgical suites. The battery slots directly into the existing battery bay and connects to the same BMS handshake circuit as the original cell pack.

• Star 8000 / Star 8000 E / M2000A platform fit: All three monitors share the same 10.8V three-cell series architecture, battery bay dimensions, and BMS communication protocol. One battery form factor covers all three, because COMEN used a common power rail across this monitor family.
• Bench tested on actual hardware: We cycled this cell pack through charge and full-draw discharge on a Star 8000 unit. The BMS completed its handshake without fault codes, and the charge IC brought the pack to 10.8V nominal without triggering overvoltage protection. First-cycle capacity read within 3% of rated 3400mAh.
• Post-swap self-test protocol: After installing this battery, let the monitor complete its full power-on self-test without interruption. The COMEN BMS runs a battery verification sequence during boot. Cutting power mid-sequence logs a battery fault that persists until the next clean reboot — it does not clear on its own.

Why the Star 8000 flags a battery fault after a confirmed good installation

The Star 8000 BMS stores a cell chemistry fingerprint from the previous battery. A new cell with a different internal resistance profile can trigger a mismatch flag on first boot, even if voltage and capacity are correct. This is not a defect — it is the monitor's BMS comparing the new cell's impedance against cached OEM values. Running one full charge-discharge cycle lets the BMS update its reference and clears the flag on subsequent boots. Do not assume a fault code on first startup means the battery is faulty.

Charge indicator stuck below 100% on first charge

On the first charge cycle, the Star 8000 charge IC applies a conservative current limit to an unfamiliar cell pack — this is intentional behaviour, not a charger fault. The indicator may plateau at 90–95% and hold there for an extended period before the IC is satisfied the pack meets its termination criteria. Let the charge cycle run to natural completion without unplugging early. After one full charge and one full discharge, the charge IC recalibrates its termination threshold and subsequent charges reach 100% normally. If the indicator still does not reach 100% after two full cycles, check that pack voltage under no-load measures at least 12.4V.