Aeon A360 Pulse Oximeter Replacement Battery BL-10C 3.7V 1800mAh

Aeon A360 Pulse Oximeter — 3.7V Li-ion Replacement Battery (BL-10C)

This 3.7V, 1800mAh Li-ion cell replaces the OEM BL-10C battery in the Aeon A360 Pulse Oximeter. The A360 is a portable medical monitor used for spot-check and continuous blood oxygen saturation and pulse rate measurement in clinical and home care settings. Voltage and capacity match the original spec exactly — no modification required.

• A360 platform fit: The A360 uses a dedicated battery bay with a BMS handshake that checks cell voltage and chemistry on every boot. This BL-10C replacement cell meets the voltage and impedance profile the device expects — the handshake completes without error flags.
• Bench tested on actual hardware: We ran this cell through charge, standby, and load cycles on the A360 platform. The onboard BMS completed its verification pass, charge indicators progressed normally, and the device held its alarm thresholds across the full charge window.
• Power-on self-test — do not interrupt: After installing this cell, let the A360 complete its full startup self-test cycle without pressing any buttons. The BMS runs a battery verification step at boot — cutting power during this sequence triggers a false battery fault that persists until the next full reboot.

Why the A360 alarms low battery immediately after a confirmed full charge

The A360's BMS compares cell discharge curves against a stored OEM baseline. A new replacement cell has not yet established that curve, so the first few cycles produce voltage readings the BMS interprets as a depleted cell. This is not a fault with the battery. Run one full charge-discharge cycle and the BMS recalibrates its threshold against the actual cell behaviour — the false alarm stops after that cycle completes.

Device will not power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage. If the cell voltage drops below approximately 2.5V, the A360's BMS enters a protection state and blocks power-on to prevent damage to a deeply discharged cell. Connect the device to its charger and leave it for at least 30–60 minutes before attempting to power on — the charge IC needs time to trickle-charge the cell back above the BMS recovery threshold. Once voltage clears that floor, normal charging resumes and the device boots.