How long should an ADT battery last?

Author: Mariane O'Conner II  |  Last update: Saturday, July 26, 2025

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. Increased use of a sensor will shorten the life of its battery.

What happens when an ADT battery is low?

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. ADT offers several battery-replacement options for our customers, including a self-service option on most systems and devices.

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.

How do I know if my alarm battery needs changing?

Beeping Keypads

If the keypad for your home alarm system starts beeping, it's a sign that the power supply is low and the battery might need to be replaced.

How long does an ADT command battery last?

Command, Pulse, and Legacy Systems:

The internal backup battery typically lasts 4 to 6 hours. Until the backup battery is depleted, your system will alert you with low battery beeps.

How long does ADT alarm battery take to charge?

How often should I replace my ADT battery?

We recommend changing all your wireless sensor batteries on an annual basis or as directed by your ADT system.

How long should alarm sensor batteries last?

Low Battery Indicators. 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.

How much does it cost to replace an alarm battery?

Home alarm system battery replacement cost

The typical cost of a replacement burglar alarm battery is between £12 and £30 depending on the type and make of battery.

Will low battery cause house alarm to go off?

The beeping or chirping will often occur at the same time. This is because many panels do their automatic battery test every 24 hours. Less commonly, a low battery condition can cause false alarms at random times throughout the day. Almost all alarm panels will also display a keypad trouble light to indicate a problem.

When should I replace my alarm battery?

Maintain your alarms

If your alarms use regular batteries, swap in fresh batteries at least once a year. A “chirping” sound means that it's time to change batteries. Because alarm sensors wear out, replace each alarm at least every 10 years.

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 check my ADT battery level?

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.

How much is ADT a month per month?

The total cost for the ADT Secure Home Package starts at:

$599 to $899 upfront + $45.99/month; or. $55.97 to $60.97/month.

What does code 14 mean on an ADT alarm?

14 OPEN – This icon is used with clock digits 1 and 2 to indicate violated zones (not alarm) on the sys- tem. When zones are opened, the OPEN icon will turn on, and 7 segment displays 1 and 2 will scroll through the violated zones. 15 Night – Indicates that the panel is armed in the Night Mode.

Why does my alarm keep 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 is my ADT chirping?

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.

How do I know if my alarm battery is bad?

4 SIGNS YOU NEED TO REPLACE YOUR ALARM SYSTEM BATTERIES
  1. You hear beeping. Many alarm systems will beep when the battery power is low. ...
  2. You keep having false alarms. ...
  3. You see a warning light or message. ...
  4. You haven't replaced the battery in over three years.

Why did my house alarm randomly go off in the middle of the night?

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.

What to do when an ADT battery is low?

System Battery

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.

What is the lifespan of a house alarm battery?

As mentioned before, an alarm battery usually lasts for three to five years. However, systems with motion sensors tend to be better at conserving energy and therefore, can have longer average battery life than simple alarm systems.

Can I change a house alarm battery myself?

If you have basic DIY skills, changing the battery in your burglar alarm is relatively straightforward. To change your home alarm battery, follow these steps: Open panel: first remove the cover of your main alarm panel by unscrewing the screws holding the front of the panel on. The alarm will then sound.

Do you have to reset alarm after replacing 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.

Will the house alarm go off if the battery dies?

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.

Will disconnecting battery stop house alarm?

Turning off a security system alarm during a power outage may seem impossible, but there are ways to accomplish this on your own. The steps to powering down an alarm without a keypad available include locating the main source of power and removing and the backup battery.

How long do ADT motion sensor batteries last?

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. Increased use of a sensor will shorten the life of its battery.

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