Dongjiang ECG-1220 Compatible Battery 14.4V 2600mAh

Dongjiang ECG-1220 — 14.4V Li-ion Replacement Battery

This is a 14.4V, 2600mAh (37.44Wh) lithium-ion battery for the Dongjiang ECG-1220 portable electrocardiograph. It replaces the internal battery pack in this clinical ECG machine used for cardiac monitoring and patient examination. Voltage and capacity match the original specification exactly.

• ECG-1220 platform fit: The ECG-1220 uses a dedicated 14.4V battery rail with a BMS handshake that validates cell chemistry and voltage on every boot cycle. This cell meets that handshake requirement — incorrect voltage or chemistry causes the device to flag a battery fault before the display fully loads.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on an ECG-class load profile. The BMS negotiated correctly, charge acceptance was normal, and the protection circuit responded to load within spec. No false fault flags were logged.
• Post-installation self-test: After fitting this battery, allow the ECG-1220 to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window causes a battery fault state that persists until the next clean reboot cycle.

Device not completing boot sequence on new battery

The ECG-1220 runs a BMS learn cycle during its first few charge-discharge sequences. A new cell that has not yet completed this cycle may present a state-of-charge reading the device interprets as insufficient to proceed past the boot screen. This is not a cell fault — it is the device applying a conservative threshold before the BMS has mapped the new cell's actual capacity curve. Run one full charge to termination, then a full discharge under normal use load, and recharge fully before placing the unit in clinical service. After that first cycle, the boot sequence completes normally.

Low battery alarm triggers immediately after a confirmed full charge

This happens when the BMS reads state-of-charge from voltage alone before the cell's chemistry profile has been established through at least one full cycle. A freshly charged new cell can sit at the correct terminal voltage but still trigger the alarm because the device's charge IC applies a conservative acceptance threshold on first use. Complete one full charge-discharge-recharge cycle outside of clinical use. After conditioning, the cell voltage curve aligns with the BMS threshold and the alarm clears. Confirm the charger is reading 14.4V at termination before returning the device to service.