ProSafe 1131 Replacement Battery 7.2V 700mAh Ni-MH

ProSafe 1131 / 1132 GSM — 7.2V Ni-MH Replacement Battery

This is a 7.2V, 700mAh Ni-MH replacement battery for the ProSafe 1131 and 1132 GSM alarm systems. It sits in the control panel and provides backup power to keep the system live during a mains outage. Swap it out when the panel logs a persistent low battery fault or stops holding charge through a power interruption.

• 1131 and 1132 GSM compatibility: Both models run the same 7.2V backup rail and use an identical physical footprint and connector orientation. The panel's charge management circuit accepts this cell directly without requiring firmware changes or jumper adjustments.
• Bench tested on actual hardware: We cycled this cell through the ProSafe panel's charge circuit and confirmed the BMS accepted the cell, completed the float charge cycle, and cleared the low battery flag within the expected 24–48 hour window.
• Post-install conditioning for Ni-MH in alarm panels: Do not run a zone or siren test immediately after fitting this cell. The panel's charge circuit needs 24–48 hours to bring the Ni-MH pack to full float charge. Triggering a diagnostic test before that point will cause the panel to report low battery even though the cell is functional.

Alarm panel losing stored programming during a power outage after battery replacement

If the panel drops its zone programming or user codes during a mains failure shortly after a battery swap, the new cell has not yet been accepted by the charge circuit. Ni-MH cells require a full conditioning period — typically 48 hours on the panel's trickle charge — before the pack can sustain the standby current draw of the control board. Until that threshold is reached, any mains interruption will cause the panel voltage to fall below the memory-retention rail, erasing volatile configuration. Leave the panel on mains power for a full 48 hours after fitting the new cell before testing backup operation.

Panel showing low battery fault hours after fitting a new cell

This is the most common post-swap report, and it is almost always a charge state issue rather than a faulty cell. The ProSafe panel samples battery voltage at regular intervals and compares it against a threshold — typically around 6.8V — to decide whether to raise a low battery event. A brand-new Ni-MH pack will read below that threshold until the charge circuit has had time to bring it up. The fault should clear automatically once the cell reaches full float charge. If the low battery flag is still active after 48 hours on mains power, check that the connector is fully seated and measure terminal voltage directly — it should read at or above 7.2V.