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How Long Do ADT Sensor Batteries Last?

Last Updated Aug 26, 2021
9 batteries stacked in a triangle on a table.
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ADT has been installing alarms and security systems for over 100 years. Therefore, they have all the experience in the world when it comes to monitoring a home or business. But what about their batteries? When you are trying to decide which company to go with, it is crucial to be knowledgeable about every aspect of your alarm system, including battery life. 

ADT has found that their batteries typically last approximately three years, but this varies depending on factors like temperature and usage. For example, if you use your alarm system frequently or live in a colder climate, it could be much less than an average of three years. 

Don’t worry if you’ve been thinking of getting an ADT sensor, but you’re unsure about battery life. In this blog post, we discuss all aspects of ADT sensor batteries so that you can make an informed decision. So let’s jump right in, shall we?

How Long Do Batteries Last in Wireless Alarm Systems?

As a general rule of thumb,  wireless alarm systems use AA batteries with an average lifespan of three to five years, but this can vary depending on the number of times it’s been used and where you live. However, the primary determinant of battery life is the model and type of battery your sensor uses.

Furthermore, if your wireless system uses a lot more power than usual due to frequent usage or living in colder climates, then the life span could be much less.  The same case applies to ADT sensor batteries. Typically, these batteries will last three to five years, but this can vary depending on the model.

Source: Alarm Grid

Factors Affecting ADT Sensor Battery Life

Although the average lifespan of  ADT sensor batteries is three to five years, many factors affect this period. These include:

Battery Types

The battery type is among the factors that impact the life of a battery.  There are two main types, alkaline and lithium-ion. Alkaline batteries typically have higher power than their lithium-ion counterparts, but they also come with some disadvantages. On the other hand, lithium-Ion batteries tend to be lighter weight and can last up to twice the amount of time as an alkaline battery, but they also have some disadvantages of their own.

In the end, it is up to you to decide which type of battery will be best for your particular needs or personal preference.

Heat and Cold

Temperature is among the top factors affecting sensor operation. Heat and cold will affect the life of a battery. For example, if your ADT sensor is in an extremely hot environment, its power may drain significantly faster than recommended. 

Likewise, using it for very long stretches indoors during extremely cold conditions can also be problematic as batteries tend to function at their best when stored between 50-77 degrees Fahrenheit.

Liquid and Humidity

Another factor that contributes to battery life is the level of liquid and humidity around the sensor. If you live in a dry, desert climate, for example, your sensor’s batteries may last longer than someone who lives in an area that regularly experiences heavy rain or fog. 

In general, low-humidity environments will cause sensors to drain their power faster as they impact the battery’s ability to generate power.

Source: Bryair

Sensor Placement 

Another factor that can impact how long your sensor’s batteries last is the placement of the sensor itself. For instance, if you have a wireless alarm system with sensors located near landscaping or other objects that attract water droplets such as leaves and branches – these will weaken battery life quickly. Similarly, if you place the sensor in an area that sees a lot of traffic, such as your front door, these sensors will also drain their batteries more quickly.

You may want to place wireless alarm system Sensors in lower-traffic areas near windows or other viewable and accessible locations for the best battery performance.

When Should You Replace Your ADT Door and Window Sensors?

A zone trouble indicator will appear on your keypad or mobile app if a door sensor trips. This indicates that you should replace the battery on that particular door and window sensor to solve the problem.

How to Replace an ADT Sensor Battery

To replace an ADT sensor battery, the first thing you need to do is to set the system to test mode to prevent a false alarm. To do this:

  • Go to
  • Go to “My Alarm” in the dashboard
  • Go to System Management
  • Proceed to “Test System” and place the system on test mode.

To replace the battery, take a flathead screwdriver and use it to push in the tab. Ensure the polarities are correct after replacing all the batteries and snap the tab back in place! Finally, don’t forget to go back to and get your system off test mode.

Source: Zion Security

Wrapping Up

If you were wondering how long ADT sensor batteries last, now you know! When you receive a zone trouble indicator push, don’t forget to check out the battery! This is a sign that it might be time to replace your battery. If it’s time, follow the replacement steps in this blog post to replace your sensor battery correctly, and you’ll be right on track again!

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