Step 1 Observe the master console of the Ademco alarm system. The "Low Bat" light is illuminated when the system needs a battery replacement. The display on the master console shows a number of the sensor that needs a battery. If your system is disarmed, the master console emits fast puls...
To replace the battery, you'll need to get a new one of the exact same kind. ADT alarm panels vary, but each one will need a sealed lead acid battery of one size or another. Before replacing the battery, you'll need to put the system in test mode by logging into MyADT.com or c...