Why does my alarm keep saying low battery?

Author: Keagan Kuhn V  |  Last update: Tuesday, June 9, 2026

It sounds like the battery in your main panel needs to be replaced. The battery is located in the main panel box of your system. This box is typically found in a utility room, closet or attic.

How do I stop my alarm from saying low battery?

If there's a low battery warning, you might need to replace the alarm system's battery. If the alarm persists after replacing the battery, consider power cycling the entire alarm system. Turn off the main power supply to the alarm, wait a few minutes, and then turn it back on.

Why does my house alarm keep saying low battery?

Low batteries normally don't cause false alarms, but sometime cause trouble notifications. However, if your system has a heavy power draw, a power failure and low-battery combination can sometimes cause too low a voltage to a powered sensor (eg a PIR) which can make it super-touchy and cause a false alarm.

How to clear low battery on adt alarm?

An ADT Alarm System's low battery beeping can be silenced by pressing the ``OFF'' button or ``#'' button on your keypad.

Do you have to reset the alarm after replacing the battery?

You typically will not need to do anything to reset your car alarm after a battery change, but it should automatically reset for you. Some vehicles or alarm systems may require you to push a reset button on the alarm box that may be located near the steering wheel.

Why does my ADT alarm say 'low battery' even after changing the batteries?

How much does ADT charge to replace a battery?

Order Summary. $0.00 when you order online. When you order on MyADT, your QSP provides one free system battery per year. Additional system batteries cost $29.99.

Why does my fire alarm keep saying low battery after battery change?

If you've installed a new battery and the alarm continues to beep, drain any residual charge from the unit. Remove the unit from the ceiling and remove its battery, then hold the test button for 15 seconds. Next, replace the battery. If the unit continues to beep, clean it using the methods we outlined above.

How do I silence the low battery on my first alert?

You can silence the low battery warning “chirp” by pressing the Test/Silence button on the alarm cover.

How do you turn off a house alarm with low battery?

How To Stop An Alarm On A Home Security System When The Power Is Off
  1. Find and disconnect the main source of power for the home security system. ...
  2. Remove the battery from the security system. ...
  3. Reset the home security system. ...
  4. Replace the battery on the security system.

What is the lifespan of a house alarm battery?

Most manufacturers recommend changing your system's battery every 3–5 years. Newer devices may last up to 7 years. If you don't know when your system was last serviced, start looking for a replacement battery now.

Will low battery cause fire alarm to go off?

A common culprit for a fire alarm that went off without apparent cause is a dead or low battery. Ensuring that smoke detectors have a healthy battery life is an essential facet of home safety.

How to reset ADT alarm panel after changing battery?

Replace the battery, observing the proper polarity. Replace the motion sensor. Reset your security system by entering your code into your system and hitting off twice.

Why does my house alarm say low battery?

The most common meaning of a low battery warning is just that – your security system has been running on battery power for an extended period of time, and the battery is low. Because of this common cause of the warning, it's often recommended to wait up to 24 hours to see if this warning goes away on its own.

Can low battery cause false alarm?

Do you find your security alarm persistently gets triggered for seemingly no reason? It could be a low battery. Low battery power can sometimes cause a false alarm at random times of the day or night.

How do I get my battery alarm to stop beeping?

Change the batteries

There are two options. Go ahead and put in fresh batteries all around. The beeping should stop when you've hit on the culprit. Use a battery tester to test all the battery-operated components of the system.

Why is my alarm still beeping after battery change?

There are a few possible causes for your smoke alarm to keep chirping even with a new battery. It might be time to buy a new detector. Check the date of manufacture printed on the back of your alarm to confirm it's not expired. Most alarms expire 7-10 years after the manufacture date.

How do you silence the low battery on a First Alert smoke alarm?

In all First Alert® ONELINK® alarms, there are two silence features: Alarm Silence can quiet nuisance alarms for several minutes. Low Battery Silence can temporarily silence the low battery chirp for up to eight hours before replacing the battery.

How do you stop a low battery fire alarm?

An alarm will chirp every 30 to 60 seconds for a minimum of seven days. With a "low battery" announcement, disconnect the unit and replace the batteries. You can also put a unit into low battery hush for up to 12 hours on newer units by pressing the test/hush button.

Why does my ADT system keep saying low battery?

The source of a low battery signal may be either the system backup battery, or it could be from a sensor, like a door sensor, smoke detector, or glass break sensor.

Do I need to call ADT to change battery?

Requesting a Replacement Battery

If you choose to replace the battery yourself, contact ADT at 1-800-ADT-ASAP to have a replacement battery sent to you or you can purchase one at a local battery supply store.

How do I stop my ADT alarm from beeping with a low battery?

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.

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