About this replacement
Pyronix Enforcer V10 / ENF32UK-WE — 9.6V Ni-MH Replacement Battery (BATT-ENF8XAA)
This is a 9.6V 2000mAh Ni-MH backup battery for the Pyronix Enforcer V10 and ENF32UK-WE wireless alarm panels. It sits inside the control panel and holds the system on during a mains failure so the panel can continue monitoring zones and sending alerts. It replaces OEM part BATT-ENF8XAA directly.
- Enforcer V10 and ENF32UK-WE fit: Both panels run the same 9.6V backup rail, use the same physical connector, and expect the same BMS handshake for charge acceptance. One battery covers both models without modification.
- Bench tested on actual hardware: We cycled this cell through charge acceptance and load draw on the Enforcer V10 panel. The BMS accepted the charge profile without fault codes, and voltage recovery after a simulated mains drop held within spec.
- Float charge conditioning after install: Do not run a zone or walk-test immediately after swapping this battery. Allow 24–48 hours on float charge before running any diagnostic test. The panel samples backup voltage continuously — a cell that has not reached full float will trigger a low-battery event on the next test cycle.
Alarm panel losing programming during a power outage with a new battery installed
If the Enforcer V10 loses its zone programming or engineer settings during a mains failure shortly after a battery swap, the cell has not yet been accepted by the panel's charge controller. Ni-MH cells need a full conditioning cycle before the panel treats them as a verified backup source. Until the battery voltage stabilises at the panel's float threshold — typically around 10.8V fully charged at rest — the BMS may not engage the backup rail under load. Leave the panel on mains power for a full 48 hours after fitting this battery before testing or cutting power.
Panel showing tamper fault immediately after battery replacement
A tamper fault appearing straight after a cell swap almost always means the panel lid or battery compartment cover is not fully seated. The Enforcer V10 uses a physical tamper switch that the enclosure presses closed when correctly shut. If the new battery is even slightly thicker in its packaging wrap, it can prevent the cover from closing flush. Remove the battery wrap if still fitted, reseat the cover, and confirm the tamper LED clears — if it does not, check the tamper switch plunger is not bent or displaced.