When your ADT system indicates a low battery, first identify if the alert is coming from your main control panel or a specific door/window sensor. Silence the beeping by entering your [User Code] + [OFF] (or pressing "OFF") on your keypad, then replace the battery to clear the trouble alert.
To clear an ADT low battery warning, first replace the dead battery in the sensor or main panel, then clear the alert on your keypad by entering your [security code] + [OFF] (or [#] on some models). The system often requires a few hours to recharge the backup battery, after which the message usually clears automatically.
Order Summary
When you order on MyADT, your QSP provides one free system battery per year. Additional system batteries cost $29.99.
ADT battery lifespans vary depending on the device:
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. Once the power comes back on, the device will turn on, and the backup battery will begin to charge.
In most cases the alarm system will activate or at least beep if there is a low battery or if the alarm system battery dies.
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.
Open your system's panel. (If you need a key to open your panel, the key is often left on top of the panel.) After opening the panel, disconnect the wires on your battery by gently tugging on them. Replace the battery by connecting the RED wire to the RED tab on the battery and the BLACK wire to the BLACK tab.
To order from MyADT.com:
ADT offers several battery-replacement options for our customers, including a self-service option on most systems and devices.
Most systems can take either a 12V 7Ah or a 12V 4Ah battery. The 4Ah size is used in smaller panel boxes. A few systems may use different voltage and Ah ratings.
Battery replacement is not covered under any warranty. If you require services excluded from coverage, then ADT will provide the services at its current labor rate for each service call.
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 silence an alarm beeping due to a low battery, you must either acknowledge the trouble alert on your system, remove the depleted battery, or replace it entirely.
A house alarm battery replacement costs between $𝟏𝟎 and $𝟓𝟎 if you replace it yourself. If you hire a professional security technician, expect to pay $𝟕𝟓 to $𝟏𝟓𝟎+ to cover both the battery and the service call.
To immediately silence the beeping, enter your system's disarm code, press the # key, or press * then 2 to acknowledge the trouble alert. To stop it permanently, you must either replace the backup battery or disconnect the system from both AC power and the battery.
Signs your battery needs replacing
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.
We recommend changing all your wireless sensor batteries on an annual basis or as directed by your ADT system.
A low battery warning is most often displayed as BAT, LOW BATT or SYSTEM LO BAT on the touchpad. This warning signals that your battery is low and must be either recharged or replaced. You can learn how to silence your specific panel by visiting our Silence Low Battery Beeping page.
A low house alarm battery means either your main control panel's backup battery or an individual wireless sensor battery needs attention. Locate the source of the beep, silence the keypad, allow 24 hours for a recharge if the power just went out, or replace the old battery.
You can do this with a control panel key (sometimes left on top of the control box), or you may need to unscrew the cover. When you open the cover, your alarm may go off. Make sure you have your code on hand to disarm your system if this occurs. Disconnect the battery.
A house alarm backup battery typically lasts between 8 to 24 hours without power. The exact duration depends on the age of your battery and how many sensors, keypads, or cellular communicators your system is actively powering during the outage.