GE D-AA700 Simon Alarm Panel Replacement Battery 4.8V 1500mAh

GE Security Simon Home Security Talking Control Panel — 4.8V Ni-MH Replacement Battery (D-AA700)

This 4.8V 1500mAh Ni-MH battery pack replaces the OEM D-AA700 cell in the GE Security Simon Home Security Talking control panel. It keeps the panel running during mains outages and holds programmed zones, entry and exit delays, and alert settings when power drops. Voltage and form factor match the original pack exactly.

• Simon control panel fitment: The Simon series uses a single dedicated battery bay with a keyed connector and a 4.8V float charge rail. The replacement cell sits on that same rail, so the panel's charge circuit accepts it without modification.
• Bench tested on actual hardware: We cycled this pack through a full discharge and recharge on a Simon-class panel. The BMS accepted the cell, held float voltage within spec, and cleared the low-battery flag after the conditioning period completed.
• Post-installation charge window: Do not run a zone or siren test immediately after fitting this cell. The panel needs 24 to 48 hours on float charge before the BMS registers full capacity — triggering a diagnostic test earlier will cause a false low-battery fault on the panel display.

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

The Simon panel stores zone programming and user codes in volatile memory backed by the battery. If the new cell hasn't completed its initial conditioning charge, it may not hold enough voltage to sustain memory during a mains interruption. The BMS on the panel won't fully accept a new cell until it has sat on float for at least 48 hours. After that window, the panel should hold all settings through an outage — if it still drops programming, check that the battery connector is fully seated and reads at or above 4.6V under no-load.

Panel shows low battery immediately after fitting the new D-AA700 cell

A fresh Ni-MH cell ships at a partial state of charge, and the Simon panel's charge circuit needs time to bring it to float before the firmware clears the low-battery flag. This is normal — it is not a fault with the replacement cell. Leave the panel on mains power for 24 to 48 hours without triggering any tests. If the low-battery indicator has not cleared after 48 hours, measure the battery terminals with a multimeter — a healthy charged pack should read at least 4.8V with no load applied.