What kind of battery does an ADT glass break sensor take?

Author: Arielle Lind  |  Last update: Thursday, September 4, 2025

If it has not been changed recently, it's time to change the battery in the sensor. You will need one 3V CR123A battery.

What batteries do ADT window sensors use?

A door and window contact requires (1) CR123 3-volt battery (in some systems, the door and window contact will be a very slim device and will contain a single, CR2032 battery). This battery can often be purchased at your local hardware, mass retailer or battery store.

What type of battery goes in an ADT motion sensor?

The motion detector requires (1) CR123A 3-volt battery.

What type of battery is needed for an ADT Glassbreak Sensor?

If it has not been changed recently, it's time to change the battery in the sensor. You will need one 3V CR123A battery.

Why is my Glassbreak Sensor beeping?

Possible Causes of False Alarms:

Obstructions: Bugs, cobwebs, or dust covering the sensor might affect its sensitivity. Incorrect Positioning: If the sensor is not positioned correctly, it might pick up unrelated noises. Low Battery: A low battery can sometimes lead to erratic behavior of the sensor.

How to change batteries in an ADT alarm glass break sensor

Does ADT replace batteries for free?

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

Why is my ADT sensor showing low battery?

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.

What type of sensor is a Glassbreak Sensor?

A glass break sensor is a sensor that detects the vibrations in the glass surface it is connected to. The device will trigger an alarm in case an intruder breaks the glass and consequently tries to enter your facility.

How do I reset a Glassbreak Sensor?

This switch may need to be reset. Additionally, taking the batteries out and putting them back in again can work. For some sensors, it's necessary to press the button on the glass break sensor a set number of times, pause, then press it again. That resets the sensor and allows it to continue working normally.

What is the life of the battery in the glass break sensor?

Expected battery life is up to 3 years with the included batteries. Battery life is dependent on device settings, usage, environment, and other factors.

What battery is needed for ADT?

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.

What type of battery does the Simplisafe glass break sensor use?

Slide the Glassbreak Sensor off of its mounting bracket. This will expose its CR-123A Lithium 3V battery, which can then be replaced.

What happens if an ADT battery dies?

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.

Are glass break sensors worth it?

Most security experts agree that in order to provide the most protection, both glass break sensors and window sensors are recommended. Here are a few reasons why having both types of sensors in your home can provide safety and peace of mind: Protection against both forms of entry.

How do you test an ADT glass break sensor?

To test the glassbreak detector:
  1. Place your system in Test Mode.
  2. Be sure that the speaker on your phone, tablet or laptop is at full volume.
  3. Stand within 12 inches of the glassbreak detector with your phone, tablet or laptop.
  4. Click on ▶ below to play the simulated glassbreak sound. ...
  5. Cancel the alarm at the keypad.

How do you reset the glass break sensor?

To do this:
  1. Slide the sensor off its' bracket by pushing it towards the wall and up.
  2. Remove the battery from the Glassbreak Sensor.
  3. Wait 15 seconds, then reinstall the battery again.
  4. Then, test the Glassbreak Sensor by placing your system into Test Mode using your Keypad.

Can a dog bark set off a glass break sensor?

Because glass break sensors work by analyzing sound frequency, it is possible that certain sensors will be set off by a loud dog bark or even a powerful gust of wind.

How do I stop my alarm sensor from beeping?

How to Stop Your Home Alarm from Beeping
  1. Rule-out danger. Look at the house alarm control panel, as well as all smoke and carbon monoxide detectors to make sure there is no real threat. ...
  2. Change the batteries. ...
  3. Check the wiring. ...
  4. Disarm the alarm system. ...
  5. Bypass the trouble spot and contact your service provider.

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