Cardioline ECG ELAN 1100 Replacement Battery 12V 2100mAh

Cardioline ECG ELAN 1100 — 12V Ni-MH Replacement Battery (110777)

This is a 12V, 2100mAh Ni-MH replacement battery for the Cardioline ECG ELAN 1100 electrocardiograph. It fits the portable ECG unit used in clinical settings for cardiac monitoring and heart rhythm analysis. OEM part numbers 110777 and 43.888.1168 both cross-reference to this cell configuration.

• ECG ELAN 1100 fit: The ELAN 1100 runs a 12V Ni-MH pack at this form factor — 116 × 45.6 × 50.8mm — with a BMS that handshakes on chemistry type. Swapping to a different chemistry triggers a persistent battery fault. This cell matches voltage, chemistry, and physical footprint exactly.
• Bench tested on actual hardware: We ran charge-discharge cycles on this cell against the ELAN 1100's charge IC. The BMS accepted the cell on first insertion and completed its verification sequence without fault flags. Capacity delivery stabilised by cycle three.
• Post-installation self-test protocol: After fitting this battery, let the ELAN 1100 complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence leaves a false battery fault stored in the charge controller that persists until the next clean reboot.

Why the ELAN 1100 flags a battery fault on a new Ni-MH cell

The ELAN 1100's charge IC uses a delta-V detection algorithm calibrated for a conditioned Ni-MH pack. A brand-new cell has a flatter charge curve in the first two cycles, which the controller can misread as a faulty or exhausted pack. This shows as a battery fault or low-battery indicator even after a confirmed full charge. Run one complete charge-discharge-charge cycle before treating any flag as a genuine fault. By cycle two, the delta-V profile normalises and the controller clears the flag automatically.

ELAN 1100 shutting off unexpectedly during a recording

The ECG acquisition circuit draws a concentrated load burst during active rhythm capture, which stresses a new cell harder than the standby current the device sits at between recordings. In the first ten cycles, the cell's internal resistance is slightly elevated, causing a brief voltage sag under that load burst. If the sag crosses the BMS undervoltage threshold — typically around 10.5V for a 12V Ni-MH pack — the device cuts out as a protection response. Charge the battery fully, complete at least one full discharge cycle through normal device use, and the sag will reduce as internal resistance drops with conditioning.