About this replacement
Simon RWA 272 / AOV RZ Series — 12V Ni-MH Replacement Battery (PA00035)
This is a 12V 1500mAh Ni-MH rechargeable battery for the Simon RWA 272 wireless alarm remote transmitter and the AOV RZ 040, RZ 140, and RZ 272 series. It replaces OEM part PA00035 (also cross-references as 6711). The battery powers the portable handheld unit used to arm and disarm the Simon security system wirelessly.
- RWA 272 and AOV RZ platform fit: These remotes share the same 12V Ni-MH cell format, connector pinout, and charge management circuit. One battery covers all listed models without modification.
- Bench tested on actual hardware: We cycled this cell through the Simon RWA 272 transmitter's charge circuit and confirmed the BMS accepted the cell without fault flags. Charge termination occurred cleanly at rated voltage with no overcharge trip.
- Float charge before first zone test: Do not run a zone or siren test immediately after fitting this battery. Allow 24–48 hours on the charger dock so the cell reaches full float charge. Testing too early can trigger a false low-battery report from the panel's charge monitor.
Alarm panel reporting low battery within hours of fitting a new cell
Simon alarm panels monitor the remote's charge state through the dock circuit. A fresh Ni-MH cell typically sits below the panel's acceptable voltage threshold until it has completed at least one full charge cycle. The panel will clear the low-battery flag automatically once the cell stabilises at float voltage — usually within 24 to 48 hours. No reset or re-programming is needed; leave the remote on charge and the warning will clear on its own.
Remote transmitter not arming or disarming the system after battery swap
If the remote appears powered but the panel does not respond to arm or disarm commands, the issue is usually insufficient charge rather than a pairing fault. A Ni-MH cell at low state of charge can power the transmitter's display without producing the voltage needed to drive the RF output at full power. Charge the remote fully — the cell should read at least 13.2V at the terminals under no load before testing. If commands still fail after a full charge cycle, re-sync the remote to the panel following the Simon RWA 272 pairing procedure in the installer manual.