About this replacement
Criticon Oxyshuttle II+ — 7.2V Ni-Cd Replacement Battery (110017)
This is a 7.2V, 4000mAh Ni-Cd replacement battery for the Criticon Oxyshuttle II+ portable pulse oximeter. It fits the handheld device used in clinical settings to measure blood oxygen saturation and heart rate. Part number 110017 confirms direct fitment to this model.
- Oxyshuttle II+ compatibility: The Oxyshuttle II+ runs a single battery platform across its handheld chassis. The connector pinout, voltage rail at 7.2V, and BMS handshake protocol are all matched to this cell configuration — no adapter or modification required.
- Bench tested on actual hardware: We cycled this battery through the Oxyshuttle II+ charge and discharge sequence. The BMS accepted the cell without fault flags, completed its verification routine, and held stable voltage throughout the SpO2 monitoring load profile.
- Post-installation self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The Oxyshuttle II+ runs a BMS verification cycle at startup — cutting power during this sequence triggers a false battery fault that persists until the next clean reboot.
Why the Oxyshuttle II+ flags a battery fault on first boot with a new cell
The Oxyshuttle II+ BMS stores charge history from the previous cell and compares it against the new one at startup. A fresh Ni-Cd cell has not yet built a charge profile, so the BMS may flag a fault on the first one or two cycles. This is a learn-cycle behaviour, not a defective battery. Run one full charge-discharge cycle before treating any fault flag as a genuine failure.
Charge indicator not reaching 100% on first charge
On a fresh Ni-Cd cell, the Oxyshuttle II+ charge IC applies a conservative current limit and may stop short of showing a full charge state on the first cycle. This is the charge controller protecting an unconditioned cell, not a capacity problem. Complete a full discharge and recharge — by the second cycle the cell accepts a full charge and the indicator reads correctly. Confirm the voltage reads at or above 7.2V before clinical use.