HUAXI HX-901A Replacement Battery 9.6V 2000mAh Ni-MH

HUAXI HX-901A — 9.6V Ni-MH Replacement Battery

This is a 9.6V, 2000mAh Ni-MH battery for the HUAXI HX-901A portable medical device. It replaces the original cell when capacity has degraded or the pack no longer holds a charge. Voltage and chemistry match the OEM specification exactly.

• HX-901A platform fit: The HX-901A uses a 9.6V Ni-MH pack because the device's internal charge controller and BMS handshake are calibrated for that chemistry. Swapping to a different chemistry or voltage rail will trip the charge IC and prevent a valid charge cycle from completing.
• Bench tested on actual hardware: We cycled this pack through charge-discharge on a medical device load profile. The BMS accepted the cell without fault, and voltage held within spec across the first three cycles. Cell internal resistance dropped measurably by cycle two, as expected for Ni-MH break-in.
• First-use self-test protocol: After installation, allow the HX-901A to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence logs a false battery fault that persists until the next clean boot cycle.

Device not completing boot sequence on new battery

The HX-901A runs a startup verification routine that checks pack voltage against a minimum threshold before completing boot. A new Ni-MH cell shipped from storage can sit below that threshold — not because the pack is faulty, but because Ni-MH chemistry self-discharges at roughly 1–3% per day. If the device halts mid-boot, connect the charger and bring the pack to full charge before powering on again. Boot should complete normally once pack voltage clears the device's minimum startup threshold, typically around 9.0V under light load.

Charge indicator not reaching 100% on first charge

The HX-901A charge IC applies a conservative current limit on cells it has not yet profiled. On the first charge, the indicator may stall below 100% even after the expected charge duration. This is the charge controller applying a reduced termination current until the cell's delta-V response is confirmed. Run one complete charge-discharge cycle, then recharge fully. By the second cycle, the charge IC will have profiled the cell and the indicator will reach 100% correctly.