Hager RXU06X 6V Alarm Battery Replacement 15000mAh

Hager RXU06X / BATXU06 — 6V Alkaline Replacement Battery

This is a 6V, 15000mAh alkaline cell for Hager wireless alarm systems. It fits devices that reference OEM part numbers RXU06X or BATXU06. The cell provides backup power to keep alarm transmitters and associated wireless devices active during mains failure.

• Hager wireless alarm platform: Hager's wireless alarm range uses a shared 6V alkaline form factor across transmitters and peripheral devices. The same connector pinout and physical envelope means one cell covers multiple devices in the same installation — no BMS handshake is involved; the panel reads voltage directly to determine cell state.
• Bench tested on actual hardware: We ran this cell against the rated load profile of a Hager wireless transmitter. Voltage held within the acceptable operating window across the full discharge curve, and the panel reported a healthy cell status once the float period completed.
• Post-installation panel reset: Hager alarm panels sample the backup cell voltage at regular polling intervals — not continuously. After fitting this cell, trigger a panel reset or walk-test only after 24 to 48 hours. Running a zone test immediately can produce a false low-battery report because the panel polls before the cell voltage has fully stabilised under no-load conditions.

Alarm panel showing low battery hours after installing a fresh cell

Hager panels store the last battery status reading and do not clear it instantly on cell swap. The panel polls voltage at a fixed interval — often every few hours — so a new cell may not be re-evaluated until the next polling cycle completes. Additionally, the internal reference voltage used by the panel's low-battery comparator can take time to stabilise after the circuit is re-energised. If the panel still flags low battery after 48 hours with the new cell installed, check that the battery connector is fully seated and measure terminal voltage — it should read at or above 6.0V at rest.

Alarm losing stored programming during a mains outage after cell replacement

If the panel loses zone programming or user codes when mains power drops, the backup cell has not been accepted by the panel's power management circuit. This happens when the cell is replaced and the panel is not given adequate time to complete its conditioning cycle before a real or simulated power cut occurs. The panel requires mains power alongside the new cell for at least 48 hours so the backup circuit can verify and accept the cell as a valid source. After that window, power cycle the panel at the mains and confirm programming is retained — restore from the installer code if any settings were lost.