CMICS DJDB144 Replacement Battery 14.4V 2600mAh Li-ion

CMICS DJDB1200 / ECG-11D — 14.4V Li-ion Replacement Battery (DJDB144)

This 14.4V 2600mAh Li-ion battery replaces the OEM DJDB144 cell in CMICS portable ECG units, including the DJDB1200, ECG-11D, and DJDB series. These are clinical electrocardiograph devices used in cardiac diagnostics across hospital wards, outpatient clinics, and emergency care settings. Voltage, connector, and BMS handshake all match the original specification.

• DJDB1200 / ECG-11D platform compatibility: These models share the same 14.4V power rail, connector housing, and BMS communication protocol, which is why a single part number — DJDB144 — covers all three. Swapping between units in the same family carries no compatibility risk at the hardware level.
• Bench tested on actual hardware: We cycled this cell through charge, standby, and active-load phases on compatible ECG hardware. The BMS accepted the new cell without fault flags, completed its verification handshake, and reported state-of-charge correctly from the first full cycle.
• Post-swap startup protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. Medical ECG units run a BMS verification routine at boot — cutting power mid-sequence triggers a latching battery fault that will not clear until the next full, uninterrupted reboot.

Device not completing boot sequence after battery swap

CMICS ECG units run a multi-stage self-test at power-on that includes a BMS authentication step. A new cell that has not yet completed one full charge-discharge cycle may report a state-of-charge value the device firmware treats as marginal, causing the boot sequence to stall or abort. This is not a fault with the battery — it is the device applying its factory safety threshold to an uncharacterised cell. Run one full charge to completion, then discharge the unit through normal operation, and the firmware will log the new cell's parameters and boot normally.

Charge indicator not reaching 100% on the first charge

On the first charge after installation, the CMICS charge IC applies a conservative current limit to a new, uncharacterised Li-ion cell, and the display may plateau at 90–95% before the charger terminates early. This is normal behaviour — the charge IC is setting a cautious upper voltage limit until it has logged a complete cycle. Let the battery sit on charge for a full session without removing it early. After the first complete charge-discharge cycle, the indicator will reach 100% and the charge IC will apply its standard termination voltage of 16.8V.