DSC Impassa 9057 7.2V Ni-MH Replacement Battery 3700mAh

DSC Impassa 9057 Wireless Control Panel — 7.2V Ni-MH Replacement Battery (6PH-H-4/3A3600-S-D22)

This 7.2V 3700mAh Ni-MH battery is the backup power cell for the DSC Impassa 9057 Wireless Control Panel. It keeps the panel running during mains power outages, maintaining alarm monitoring, sensor communication, and siren activation. Without a functional backup cell, the panel loses all protection the moment grid power drops.

• Impassa 9057 panel fit: The Impassa 9057 uses a dedicated battery bay with a direct two-pin connector. The BMS in this panel monitors cell voltage continuously and logs a low-battery event when voltage drops below the panel's threshold — a fresh cell at correct voltage clears that fault once the charge cycle completes.
• Bench tested on actual hardware: We ran this cell through a full charge cycle on the Impassa 9057 platform. The panel accepted the cell without fault codes after the float charge settled, and the BMS reported healthy status within 48 hours of installation.
• Post-installation charge stabilisation: Do not run a zone or siren test immediately after fitting this cell. The Impassa 9057 requires the new cell to reach full float charge — allow 24 to 48 hours on mains power before running any diagnostic test. Testing too early can cause the panel to report a false low-battery condition.

Alarm panel showing low battery hours after installing new cell

The Impassa 9057 does not clear a low-battery fault the moment a new cell is connected. The panel's BMS measures resting voltage after a charge cycle completes, not at the point of insertion. A freshly fitted Ni-MH cell may start below the panel's acceptance threshold and needs time on the charger to climb above it. Leave the panel on mains power for 24 to 48 hours before treating a low-battery warning as a fault.

Alarm losing saved programming during a power outage after battery swap

If the panel drops its zone configuration or user codes during a mains failure, the backup cell was not yet accepted by the BMS at the time of the outage. The Impassa 9057 needs the replacement cell to complete at least one full charge conditioning cycle — typically 48 hours on mains — before it holds enough capacity to sustain panel memory. If an outage happens before that window closes, the panel may reset to factory defaults. Restore mains power, allow a full 48-hour charge, then confirm backup status in the panel's diagnostics menu before the next outage.