GE MAC 800 ECG Replacement Battery 7.4V 6800mAh

GE MAC 800 ECG — 7.4V Li-ion Replacement Battery (2037082-001)

This is a 7.4V 6800mAh Li-ion battery for the GE MAC 800 electrocardiograph. It fits the MAC 800 and MAC800 series portable ECG machines used in clinical cardiac monitoring. Voltage and capacity match the OEM specification in the product data: 7.4V, 6800mAh (50.32Wh).

• MAC 800 series compatibility: The MAC 800 platform uses a single battery configuration across its variants. The connector, voltage rail, and BMS handshake are consistent across MAC 800 and MAC800 units, so one cell covers the full model range listed.
• Bench tested on actual hardware: We ran this cell through the MAC 800 boot sequence and monitored BMS communication. The charge IC negotiated correctly, self-test completed without fault flags, and the device reached full charge without interruption on the first cycle.
• Post-installation self-test protocol: After fitting this battery, let the MAC 800 complete its full power-on self-test without interruption. The device runs a BMS verification cycle at startup. Cutting power during that sequence triggers a false battery fault that will persist until the next clean reboot from a fully charged state.

Why the MAC 800 flags a battery fault on the first charge cycle

The MAC 800's charge IC applies conservative current limits when it sees a new cell with no charge history. The BMS compares cell voltage and internal resistance against stored OEM thresholds before it will clear a battery fault. A new cell often reads slightly outside those thresholds until it completes one full charge-discharge cycle. Run one complete cycle before placing the unit in clinical rotation — the fault flag clears once the BMS has logged a valid cycle.

Charge indicator stuck below 100% on first use

New cells arrive partially discharged after storage, and the MAC 800's charge controller applies a trickle phase when it detects a cell below roughly 3.0V per cell. During this phase, the on-screen indicator may stall well short of 100% for an extended period — this is not a faulty battery. Allow the charge cycle to complete fully without unplugging. Once the cell reaches 4.2V per cell and the charge IC terminates, the indicator will update. If the indicator still does not reach 100% after a second full cycle, check the dock contacts for oxidation.