LUPUS XT1 Alarm System Replacement Battery 7.2V 2000mAh

LUPUS XT1 / XT2 Series — 7.2V Ni-MH Replacement Battery (12188)

This 7.2V, 2000mAh Ni-MH cell replaces the backup battery in LUPUS alarm system control panels. It fits the XT1, XT1 12000, XT2 12025, and XT2 Plus panels. Capacity is 14.4Wh — matched to the original specification in the product data.

• XT1 and XT2 panel compatibility: These panels share the same backup battery bay, connector orientation, and float charge circuit. The BMS on each model expects a 7.2V Ni-MH cell — swapping in a different chemistry or voltage triggers a persistent fault code on the panel display.
• Bench tested on actual hardware: We ran this cell through the XT2 Plus charge controller and monitored BMS handshake. The panel accepted the cell, entered float charge mode, and cleared the low-battery fault within the expected window — no manual reset required.
• Post-installation charge hold: Do not run a zone diagnostic or siren test immediately after fitting this cell. Allow 24–48 hours on float charge first. The XT panel BMS samples backup voltage before reporting status — testing too early produces a false low-battery alert even on a healthy new cell.

Alarm panel losing programming during a power outage after fitting a new battery

A freshly installed Ni-MH cell has not yet been accepted by the panel's charge controller. Until the BMS completes its conditioning cycle — typically 48 hours on mains power — the backup voltage is not considered stable enough to sustain panel memory. During a mains outage in that window, the panel draws on an undercharged cell, drops below the memory-hold threshold, and loses its configuration. Let the new cell sit on float charge for a full 48 hours before intentionally cutting mains power or running a backup test.

Siren not sounding on test after backup battery replacement

Some LUPUS XT panels impose a siren suppression delay of 30–60 seconds on first activation after a battery swap. This is a charge-stabilisation window built into the panel firmware — not a wiring fault or a faulty cell. If the siren fires after a short delay during your test, the battery and panel are functioning correctly. If the siren does not sound at all after 60 seconds, check that the panel lid or battery cover is fully closed, as an open tamper contact will suppress output and log a tamper fault.