About this replacement
Schiller Argus OXM C — 7.4V Li-ion Replacement Battery (LI103450-2S)
This is a 7.4V, 2000mAh Li-ion replacement battery for the Schiller Argus OXM C portable pulse oximeter and the Care Vision HP100. It replaces OEM part number LI103450-2S. The Argus OXM C uses this cell to power continuous SpO2 and pulse rate monitoring in clinical and home settings.
- Argus OXM C and Care Vision HP100 fitment: Both devices run the same 7.4V two-cell Li-ion pack with an identical connector pinout and BMS handshake protocol, which is why a single part number covers both platforms.
- Bench tested on actual hardware: We ran this battery through full charge and discharge cycles on the Argus OXM C. The BMS accepted the cell, completed its initialisation sequence, and reported accurate state-of-charge throughout. No false low-battery flags after the first full conditioning cycle.
- Post-swap startup protocol: After fitting this battery, let the device complete its full power-on self-test without interruption. The Argus OXM C runs a BMS verification step at boot — cutting power mid-sequence can lock in a false battery fault that does not clear until the next complete reboot.
Device not completing boot sequence on new battery
The Argus OXM C runs a self-test at startup that includes a BMS handshake. A replacement cell that has been in storage may sit below the threshold the device expects to see at boot, even if the cell is not deeply discharged. The device interprets this as a fault and halts before the main screen loads. Charge the battery fully before the first installation — do not fit it straight from the packaging and attempt to power on.
Charge indicator not reaching 100% on first charge
The Argus OXM C charge IC applies a conservative upper limit on cells it has not yet profiled. On a new LI103450-2S pack, the first charge often terminates between 90–95% as the IC holds back until cell impedance data is established. This is not a defective cell or charger fault. Run one complete charge-to-discharge-to-charge cycle and the indicator will reach 100% consistently from the second charge onward.