About this replacement
GE MAC 400 / MAC 600 / MAC C3 — 7.4V Li-ion Replacement Battery (2047357-001)
This 7.4V 2200mAh Li-ion battery replaces OEM part numbers 2047357-001, 2030912-001, and 2073265-001 in the GE MAC 400, MAC C3, and MAC 600 electrocardiograph systems. These are portable 12-lead ECG machines used in hospitals, clinics, and emergency settings. Voltage, connector, and BMS communication match the original cell exactly.
- MAC 400, MAC C3, and MAC 600 platform fit: All three models share the same battery bay geometry, 7.4V nominal rail, and BMS handshake protocol. One cell revision covers the full platform without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a MAC 400 unit. The BMS accepted the cell on first insertion, completed the charge cycle without fault, and passed the device self-test. Capacity read 2200mAh within normal variance.
- First boot after installation: After fitting the new battery, allow the MAC 400 to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup. Cutting power during that sequence locks in a false battery fault that persists until the next clean reboot.
Why the MAC 400 reports a battery fault after swapping a new cell
The MAC 400 BMS stores chemistry calibration data from the previous cell. When a new cell is installed, the BMS compares its learned thresholds against the new cell's initial state of charge and internal resistance. If those values fall outside the stored window, the device flags a battery fault even though the cell is good. One full charge-discharge cycle resets the calibration window to match the new cell. After that cycle, the fault clears and does not return.
MAC 400 will not power on after battery sat unused in storage
Li-ion cells self-discharge at roughly 2–3% per month in storage. If the replacement battery sat in a warehouse for an extended period, its resting voltage may have dropped below 6.0V — the threshold below which the MAC 400 BMS refuses to initiate a boot sequence. Connect the device to mains power and leave it on the charger for at least two hours before attempting to power on. Once the cell recovers above 6.8V, the BMS re-enables the power-on path and the device boots normally.