Recharge or Replace a Battery
Determining when to recharge or replace a low battery
A low battery warning is most often displayed as BAT, LOW BATT or SYSTEM LO BATT on the touchpad. The source of a low battery signal may be either the system backup battery, or it could be from a peripheral device, like a door sensor, smoke detector or glassbreak detector. This warning signals that your battery must be either recharged or replaced.
System Battery
The system battery is a backup power supply. If you have experienced a recent power outage or if your system has been running on battery power rather than AC power for any other reason, it may just need to be recharged. Allow your system 48 hours to recharge the system battery. If the problem persists 48 hours after AC power has been restored, your battery should be replaced. Please refer to the Identify Your System Battery page to determine which battery your system uses.
Sensor Battery
A low sensor battery is usually indicated by a low battery message followed by a zone number. Sensor batteries are not rechargeable and will need to be replaced. Please refer to the Find the Right Sensor Battery page to determine which battery your device uses.