About this replacement
Zevex EnteraLite — 7.2V Ni-MH Replacement Battery (7231)
This is a 7.2V, 2000mAh Ni-MH battery for the Zevex EnteraLite enteral feeding pump. It replaces OEM part number 7231 and restores mobile operation for tube feeding delivery away from a wall outlet. Capacity is rated at 14.4Wh, matching the original cell specification.
- EnteraLite platform fit: The EnteraLite uses a 7.2V Ni-MH chemistry with a specific BMS handshake that checks cell voltage at power-on. This replacement matches that voltage rail and connector, so the pump's internal controller recognises the pack at startup without throwing a fault.
- Bench tested on actual hardware: We cycled this cell through the EnteraLite's full charge-discharge sequence and confirmed the BMS reached charge completion without triggering a low-voltage cutoff alarm. The pack passed the pump's self-test on the second full cycle.
- Post-installation self-test protocol: After fitting this battery, let the EnteraLite complete its full power-on self-test without interrupting it. The pump runs a BMS verification sequence at startup — cutting power mid-cycle stores a false battery fault in memory that persists until the next complete reboot.
Why the EnteraLite alarms low battery immediately after a confirmed full charge
The EnteraLite's charge controller compares incoming cell voltage against a threshold calibrated for a conditioned OEM cell. A new Ni-MH pack has not yet established its full voltage curve, so the BMS reads it as undervoltage even at 100% state of charge. This is not a fault with the battery — it is the charge IC applying a conservative limit on an unconditioned cell. Run one complete charge-to-discharge-to-charge cycle before clinical use, and the alarm will clear on its own.
EnteraLite will not power on after the replacement battery sat in storage
Ni-MH cells self-discharge during storage, and if the pack voltage drops below approximately 5.0V the EnteraLite's BMS enters a protection state and refuses to boot. The pump shows no response — no display, no alarm, nothing. Place the battery on a compatible external Ni-MH charger first to bring the cell voltage above the BMS recovery threshold before reinstalling it in the pump. Once the pack reads above 6.0V on the charger, reseat it in the device and attempt a normal power-on.