About this replacement
Clinical Dynamics NIBP GX-2 Series — 19.2V Ni-MH Replacement Battery (460005-078)
This is a 19.2V, 2500mAh Ni-MH replacement battery for the Clinical Dynamics NIBP GX-2 non-invasive blood pressure monitor. It also fits the GX-2 Smart Arm, SS100A Smart Sat, and Smartarm SPO2, among others. OEM part numbers covered include 460005-078, BATT/110476, AS10973, B10973, OM10973, and MB210B.
- GX-2 and Smart Arm platform fitment: These models share the same 19.2V power rail, connector pinout, and BMS handshake protocol. One cell pack covers the full group — no adapter or modification needed.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the GX-2 platform. The BMS handshake initialised cleanly, charge acceptance was normal from the first cycle, and the device completed its power-on self-test without fault codes.
- Post-swap startup protocol for clinical equipment: After installing this battery, let the device complete its full power-on self-test without interruption. The GX-2 runs a BMS verification sequence at startup. Interrupting it — even once — can lock in a false battery fault that only clears on a clean reboot.
Why the GX-2 reports low battery immediately after a confirmed full charge
The GX-2's charge IC applies a conservative acceptance threshold that new Ni-MH cells don't meet on the first cycle. The BMS is calibrated to the internal resistance profile of a conditioned cell — a fresh pack reads slightly outside that window. After one complete charge-discharge cycle, the cell's internal resistance drops into the expected range and the alarm clears. Do not use the device in a clinical setting until that first conditioning cycle is complete.
GX-2 not powering on after the battery sat in storage
Ni-MH cells self-discharge at roughly 1–2% per day. A pack that has been in storage for several weeks can drop below the GX-2's BMS recovery threshold — typically around 14–15V on a 19.2V Ni-MH pack — and the device will not boot. Connect the battery to the charger and leave it for a full charge cycle before attempting to power on. If the charger shows no activity after 30 minutes, the cell voltage may be too low for the charge IC to detect; remove and reinsert the pack to force a re-detection attempt.