About this replacement
Ascor Syringe Pump — 9.6V Ni-MH Replacement Battery (784096)
This is a 9.6V, 1500mAh Ni-MH replacement battery for the Ascor syringe pump, part number 784096. Ascor syringe pumps are medical infusion devices used in hospitals and clinical settings to deliver precise volumes of medication through IV lines. Match the part number and voltage before installation — do not substitute chemistry types on infusion equipment.
- Ascor syringe pump platform: These pumps run a tightly controlled 9.6V rail to maintain accurate motor speed across the full dose range. A voltage mismatch — even within Ni-MH — throws off the motor control loop and compromises delivery accuracy.
- Bench tested on actual hardware: We cycled this cell through the Ascor pump's BMS handshake and confirmed charge acceptance, self-test pass, and clean cutoff at the pump's low-voltage threshold. No false faults were triggered after the first full charge-discharge cycle.
- Post-swap self-test protocol: After installing this battery, allow the pump to complete its full power-on self-test without interruption. Medical device BMS firmware runs a verification sequence at startup — cutting power mid-cycle causes a persistent false battery fault that will not clear until a clean reboot with a full charge present.
Why the Ascor pump alarms low battery immediately after a confirmed full charge
The pump's BMS compares internal resistance and voltage response against a stored OEM cell profile. A new replacement cell has not yet established its electrochemical baseline, so the BMS reads it as marginal on the first cycle. This triggers the low-battery alarm even when the cell is fully charged. Run one complete charge-discharge cycle before clinical use — after that cycle, the BMS calibrates to the new cell and the alarm clears at 9.6V.
Pump fails to power on after battery sat in storage
Ni-MH cells self-discharge at roughly 1–2% per day. A cell that has been sitting — whether in the pump or on a shelf — can drop below the BMS recovery threshold, typically around 8.0V for a 9.6V pack. Below that threshold, the BMS locks out power-on to protect the circuit. Connect the pump to mains power and leave it on charge for a minimum of two hours before attempting to boot on battery alone.