About this replacement
Zede Single Micro Injection Pump ZD-50C6 — 14.4V Ni-MH Replacement Battery (AA14.1)
This is a 14.4V, 2000mAh Ni-MH replacement battery for the Zede Single Micro Injection Pump, covering both the standard Single Micro and ZD-50C6 models. It matches the OEM part number AA14.1 and fits the original battery compartment without modification. Capacity figure is taken from product specification: 2000mAh (28.8Wh).
- Single Micro and ZD-50C6 compatibility: Both models run the same 14.4V Ni-MH battery platform, share an identical connector and BMS handshake protocol, and draw from the same charge management IC. One battery covers both units.
- Bench tested on actual hardware: We ran charge and discharge cycles on this cell under a simulated infusion pump load profile. The BMS passed the self-test sequence on each run and held voltage within the accepted operating band across all cycles.
- Post-installation self-test protocol: After fitting this battery, allow the pump to complete its full power-on self-test without interruption. Zede injection pumps run a BMS verification routine at startup — cutting power during this sequence trips a false battery fault that persists until the next clean reboot.
Device not completing boot sequence after battery swap
The Zede pump's BMS checks cell voltage and chemistry fingerprint during the boot sequence before it will release the motor drive circuit. A freshly fitted Ni-MH cell that has partially self-discharged in storage can fall below the BMS boot threshold, causing the device to hang or restart mid-sequence. This is not a faulty battery — it is a low starting voltage problem. Charge the new battery fully before the first installation, and confirm the cell reads at least 14.4V at the terminals before fitting.
Low battery alarm triggering immediately on a confirmed full charge
On first installation, the pump's charge controller has no capacity history for the new cell and applies conservative BMS thresholds calibrated to a broken-in OEM cell. A new Ni-MH cell has slightly lower initial charge acceptance, which the BMS can read as a partial charge even after a complete charge cycle. Run one full charge-to-discharge-to-charge cycle before clinical use — this allows the BMS to complete its learn cycle and update the low-battery trigger to the correct threshold for this cell's actual capacity. After that first conditioning cycle, the alarm behaviour normalises.