ADT System Low Battery: Ultimate Guide

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Written By Dinu Sri

Dr H. T. D. S. Madusanka is an electronic expert with 10 years of experience, involved in the research and development of SMART HOME systems.

In this guide, we’re going to cover what does ADT low battery mean? How can you stop the ADT alarm from beeping? How to replace the ADT battery? And more.

As you can see, we’ve got plenty to cover, so let’s not waste any time and dig right in.

What does ADT low battery mean?

This is a good question. Because if you don’t even know, what does ADT low battery even mean, then why should you even pay attention to it?

We mean, if it only means that you’re getting a notification on your ADT system’s screen saying, “low battery alert” and the notification has absolutely no consequences, then who even cares about it? Absolutely no one, that’s who.

samsung smart tv
samsung smart tv

Therefore, getting the proper answer to this question is incredibly important. Alright, since we’ve made it clear why a proper answer to this question is important, let’s talk about the answer.

When you get a notification on your screen saying, “low battery alert,” it means that the backup battery is low and therefore if you don’t recharge your battery or replace it (sometimes), then the ADT system will stop working.

As you can see, it’s important that you should take this alert seriously. Otherwise, you’ve spent money on your system but you no longer will reap the benefits.

Soon, we’ll talk about the solution to this problem. But first, you’re probably thinking, why am I hearing this awfully loud alarm and how can I make it stop.

It’s a good question, and this is what we’re going to talk about in the next section.

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

If you prefer to watch a video, here you go.

As we’ve already said, it’s a good question. Because no one wants to hear this awfully loud noise. Making it stop before moving forward is the right thing to do, because who wants to torture their ears.

In most cases, the process for silencing the beeping is quite simple. Go to your device, and get your fingers jammed on the keyboard.

Alright, now look for the OFF button on the keyboard. Have you found it? If not, now worries. Some keyboards don’t have the OFF button. If that’s your case, don’t worry. Instead, look for # button and press it (it should get the job done).

If this doesn’t work, then you’ll have to do a bit more work. Go grab your user’s manual and find out how you can stop the beeping. You’ll find your solution there.

Meanwhile, to make the beeping less annoying you can turn down the sound a little by reducing the volume through the keyboard on your ADT system.

How do you fix ADT low battery?

If you’re getting the notification of low battery alert on your ADT system, it means that you will most likely have to buy a new battery.

Therefore, we’re not going to talk about how to recharge the battery, instead we’ll talk about how to change the battery.

Of course, this doesn’t mean that you shouldn’t even try charging the battery. The reason is, there is still some chance that your battery might be completely fine.

If this is the case with you, then you will save yourself some money. Alright, so how do you know if the battery is working fine or if it needs to be replaced?

Here is how. You charge the battery. You might say that I’ve tried to charge the battery for 2-4 hours and it’s still not working. This might seem like your battery is dead, and you need a new one.

It makes sense because if you’ve been charging the battery for hours and still you get nothing; it does seem like you need a new battery. So go ahead and order a new one.

But, before you do so, hear us out. We didn’t mean what we said. Why? Because the battery needs to be recharged for at least 48 hours before coming to the conclusion.

Alright, once your battery is fully recharged it’s most likely that the system will start running. But, it doesn’t mean that everything is fine. Because if there is something wrong with the battery, within an hour or two you’ll start seeing issues with the ADT system.

If that is your case, then we’re sorry to tell you that your battery has expired. Alright, now let’s talk about where you can get a new battery.

Where to buy ADT batteries from?

This is a pretty simple process. Just go to and place an order. It’s even better if you’ve got an ADT store near where you live, you can call them and have the new battery delivered at your doorsteps.

We bet this is a relief. Now, let’s talk about how to replace the ADT battery.

How to replace an ADT battery?

To replace your battery, first you’ll need to know what type of battery you need. If you already know it, awesome. If you don’t, no need to worry because we’ll tell you how to find it out.

The reason that you can’t just call the store and tell them to send a battery as a replacement is there are various types of ADT system and the type of battery depends on the system.

That’s good to know, isn’t it? Awesome. So, how to find out what type of battery is a good fit for your system? It’s not that hard actually, but it’s not just too easy either because it may take some time.

Nonetheless, here is how you find it out. Grab your User Manual and read it. There, you’ll find the answer to your question. But what if you’ve lost your User Manual?

Then you don’t know the answer, it’s that simple. Just kidding. You can go to and you’ll find the answer to your question there.

So now you know what type of battery you need, and you’ve ordered it. Awesome. Now wait till your battery arrives.

Ok, now it’s time to replace the battery. The instructions are pretty simple and by following them your problem will be solved.

Replacing the battery

First, you should make sure that your ADT system shouldn’t create a false alarm.

Step 1: To do so, go to and then go to the dashboard.

Step 2: From there, choose the “My Alarm Area” from the menu.

Step 3: Once you’re in the My Alarm Area, find the option called Test Mode and enable it. Now your system won’t create any alarm.

Step 4: Now grab a flat screwdriver and push the tabs at the end of the contact which has an arrow pointing towards it.

Step 5: Now take the old battery out and place the new battery inside and then cover the device back up.


By reading this post, you’ve found the solution to the Low Battery problem of the ADT system. Although, we’ve tried our best to explain each point in as simple a manner as possible, still if any point is not clear let us know in the comments section.

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