Aricon ECG-3C Replacement Battery 11.1V 2600mAh Li-ion

Aricon ECG-3C — 11.1V Li-ion Replacement Battery

This 11.1V 2600mAh Li-ion cell replaces the internal battery in the Aricon ECG-3C electrocardiograph. The ECG-3C is a portable cardiac monitoring device used in clinical settings for heart rhythm analysis and patient data recording. Fit, voltage, and connector match the original unit.

• ECG-3C platform: The ECG-3C runs a three-cell Li-ion configuration at 11.1V nominal to power the acquisition board, display, and signal processing simultaneously. This replacement matches that cell count and voltage rail exactly, which keeps the BMS handshake valid on power-up.
• Bench tested on actual hardware: We cycled this battery through charge and discharge under a load profile matching ECG signal acquisition. The BMS reported valid state-of-charge across all test runs, and the protection circuit tripped correctly at both overvoltage and undervoltage thresholds.
• Post-swap startup protocol: After fitting this battery, allow the ECG-3C to complete its full power-on self-test without interruption. Medical device BMS firmware runs a verification sequence at startup — cutting power during this window logs a false battery fault that persists until a clean reboot clears it.

Why the ECG-3C does not complete its boot sequence on a new battery

The ECG-3C BMS checks state-of-charge during boot and compares it against a minimum threshold before allowing the acquisition board to initialise. A new cell shipped at storage charge — typically 40–60% — can sit just below the firmware's boot threshold depending on transit losses. If the device stalls at the loading screen or powers off before the waveform display appears, charge the battery fully before the first boot attempt. A full charge brings cell voltage to 12.6V, which clears the threshold check and lets the boot sequence complete normally.

Charge indicator not reaching 100% on the first charge cycle

The ECG-3C charge IC applies a conservative current limit when it detects a new or previously depleted cell. This is intentional — the IC uses the first charge cycle to profile internal resistance before it allows a full termination voltage. The display may hold at 95–98% for an extended period before jumping to 100%. Do not interrupt the charge. Let the cycle run to natural termination, then run one full discharge under normal device operation before relying on the charge indicator for clinical scheduling.