Both your system and your peripheral devices use messages and beeps to indicate a low battery status. If your system battery is running low, most of our systems will display notifications like LOW BATT or BAT.
An ADT Alarm System's low battery beeping can be silenced by pressing the ``OFF'' button or ``#'' button on your keypad.
Low System Battery
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.
When you order on MyADT, your QSP provides one free system battery per year. Additional system batteries cost $29.99.
The amount is typically $59.99 per visit. To avoid being charged a fee, you can schedule a virtual service job by calling (800) ADT-ASAP or visit our online support center at www.adt.com/help for self-service solutions to most common issues.
If the low battery message does not clear for more than 24 hours after the battery is replaced, then you should delete and re-add the sensor. Although the batteries in your door & window sensors may have a shelf life of up to 10 years, when used in a device, battery life expectancy is up to 2 years.
You will see low batteries as a trouble condition on your home screen in the Control app. Tap the trouble icon to see a list of devices with a low-battery condition.
Yes. In case of a power loss, the back-up battery will activate and will operate your alarm system for several hours. In the event your system battery is or becomes low, a low-battery signal will be sent to ADT's Customer Monitoring Center.
A common cause of beeping is low batteries. If any component of your system operates on batteries, replace them and then reset the alarm to allow the system to register the new batteries. The controller often has a backup battery which may need replacing.
To get your smoke alarm to stop chirping if you've already changed the battery, first try draining any residual charge by holding the test button down for 15 seconds. If this doesn't solve the problem, clean the unit. A blast of compressed air will often remove the dust particles that are causing the beeps.
The problem could be as simple as a low or dead battery in one of your sensors, which can trigger burglar and smoke alarms. Pets could also be the culprit — if your sensors aren't calibrated properly or don't have advanced pet detection features.
Most systems will begin beeping or chirping as a result of a total power outage or failure to recharge the system backup battery. For many of our most popular systems, beeping alarms and low battery trouble beeps can be silenced by pressing the [OFF] or [#] buttons from the keypad.
To disarm, press the “Disarm” button, followed by your 4 digit master code. o Keychain: You may also use your keyfob/remote to disarm the system. You can do this outside your home before you come in, or after you enter your home. If you do it after you enter, you will have only 30 seconds to disarm the system.
Most systems will begin beeping or chirping as a result of a total power outage or failure to recharge the system backup battery. For many of our most popular systems, beeping alarms and low battery trouble beeps can be silenced by pressing the [OFF] or [#] buttons from the keypad.
A Low Battery Warning is most often displayed as BAT, LOW BATT or SYSTEM LO BAT on the touchpad. In addition, many systems will “beep” or “chirp” to alert you that a system or peripheral device battery is low. This warning signals that your battery must be either recharged or replaced.
98% of the time an alarm rings during a power cut is because this battery is dead! Therefore when the mains is removed, the main control panel battery can't keep the system running so the external sounder starts ringing to inform you there's a problem.
If so, the device will run on its backup battery for up to 24 hours, and you will get a low battery alert as it is depleted. If AC power is not restored before the battery dies, the device will power down.
To change the battery:
Use a flathead screwdriver to push in the tab on the end of the contact. An arrow on the front of the contact points to where the tab is located. Replace the battery, observing the proper polarity. Replace the front cover by snapping it into place.
If you can be reached, the ADT Monitoring Centers will explain the signal, and tell you to vacate the premises immediately. Afterwards, or if the ADT Monitoring Centers cannot reach the premises, the agent will notify the Fire Department and a patrol agency if necessary.
ADT Home Security Cost. You can get a full ADT package for as low as $390, and monthly monitoring costs between $24.99 and $49.99. Rob Gabriele , Managing Editor & Home Security Expert Updated January 14, 2025.
Call (800) 521-5456 or fill out the form and an ADT Specialist will call you about ADT and LifeShield offers.