How To Change Battery on ADT Motion Sensor: 7 Steps

Do you want to know how to change battery on ADT motion sensor? Yes, Changing the battery in an ADT motion sensor is actually very simple.

As a new homeowner who just installed my ADT security system last year, I panicked the first time the low battery beep went off in the middle of the night.

But after successfully replacing it myself, I now have total peace of mind knowing I can easily swap the battery to keep my family safe and protected.

In this DIY guide, we’ll walk through everything you need to know about changing the battery in your ADT motion sensors, including:

• Why you may need to change the battery
• How often you should change the ADT motion sensor battery
• What type of battery to use
• Steps to change the battery
• Troubleshooting tips
• And more

Whether you just got a low battery warning or want to be proactive, this article will teach you how to easily swap out the dead battery for a fresh one in your ADT motion detectors.

Let’s dive in!

Why Does the ADT Motion Sensor Battery Need to be Changed?

The battery in your ADT motion sensor powers the sensor so it can detect movement and communicate with the ADT panel.

Like any battery, it will eventually run down and need to be replaced.

There are two main reasons you may need to change the battery in your ADT motion sensors:

1. You Get a Low Battery Warning

ADT motion sensors constantly monitor their own battery levels. When the battery starts running low, the sensor will send an alert to your ADT panel.

You’ll see a “low battery” warning for that specific sensor letting you know it’s time to swap in a fresh battery.

This warning system prevents your battery from fully draining before you can replace it.

That helps ensure your security system remains actively monitoring for intruders.

2. For Routine Maintenance

You don’t have to wait for a low battery warning to change your ADT motion sensor batteries.

Many homeowners swap the batteries once or twice a year as routine maintenance.

Replacing batteries on a schedule helps avoid any disruptions in monitoring.

It also adheres to ADT’s recommendation to change batteries every 12 months.

Routinely changing batteries ensures your motion sensors are always operating at peak performance.

A maintenance schedule reminds you to swap batteries before they ever fully drain.

How Often Should You Change the ADT Motion Sensor Battery?

ADT recommends changing the battery in motion sensors at least once every 12 months.

That timeframe ensures you replace the battery well before it dies.

Certain factors can make batteries drain faster, requiring more frequent changes:

• Frequent motion detection – Sensors that activate often due to pets or high traffic areas will deplete batteries quicker.
• Extreme temperatures – Very cold or very hot climates can impact battery life.
• Faulty batteries – Manufacturing defects happen, and some batteries die prematurely.
• High usage devices – Sensors paired with cameras, lights, or other devices may deplete batteries faster.

If you’re dealing with any of those factors, check and change batteries more often than annually. Every 6-9 months is a good timeline for high usage sensors.

You can always rely on the low battery warnings if you’re unsure how often to preemptively swap batteries.

Just don’t let sensors die completely, or they will stop communicating with the ADT panel.

What Type of Battery Does the ADT Motion Sensor Use?

Nearly all ADT motion sensors run on common AAA or AA alkaline batteries.

ADT motion sensors are wireless and battery powered so they can be flexibly placed anywhere in your home.

Standard, inexpensive AAA or AA batteries allow the sensors to operate maintenance-free for up to a year.

AAA Batteries

Many ADT motion sensors, especially newer models, use AAA batteries. These mini batteries are inexpensive and widely available.

AAA batteries insert directly into the motion sensor compartment.

AAA batteries are lightweight, so they won’t weigh down wall-mounted motion detectors. The AAA size also allows sensors to maintain a compact, discreet profile.

AA Batteries

Some older or larger ADT motion sensor models may run on AA batteries. The AA size is a bit longer and wider than AAA batteries.

AA batteries are also alkaline and inexpensive. You can buy them at any grocery store, convenience store, or battery shop.

Despite the larger size, AA batteries slide right into the motion sensor battery compartment, just like AAA batteries.

The main difference is that AAs may provide a bit more battery life in large, power-hungry motion sensors. For most standard sensors, AAA batteries will provide sufficient power.

Built-In Batteries

A few ADT motion sensors may have built-in, proprietary rechargeable batteries instead of AAA or AA replaceable batteries.

Built-in batteries can’t be replaced. Once depleted, you’ll need to replace the entire motion sensor.

Built-in batteries are less common as they offer less convenience and customizability for homeowners.

To determine what type of battery system your model uses, check the sensor compartment.

User manuals also specify whether the device uses traditional or built-in batteries.

Gather the Right Replacement Batteries

Before changing the battery in your ADT motion detector, gather the necessary supplies:

• New AAA or AA batteries – Check your user manual for the required battery type and quantity needed per sensor. Have fresh batteries on hand before taking the dead battery out.
• Small screwdriver – You’ll need this for releasing the battery cover screws.
• Cloth and cleaning solution (optional) – Consider wiping down the motion sensor while you have it open to clean the lens and maintain performance.

Only use mild cleaning solutions that won’t damage plastic components. Avoid getting any moisture inside the sensor or near the battery terminals.

Purchase new alkaline batteries specifically made for security systems and electronic devices.

Avoid cheap batteries that could leak or drain quickly in a motion sensor. A multipack of name brand AAA or AA batteries is a smart investment for your home security.

With fresh batteries and tools in hand, you’re ready to swap out the dead battery in your ADT motion detector.

7 Steps On How To Change Battery on ADT Motion Sensor

Changing the battery in an ADT motion sensor takes just a few minutes. With the right batteries and screwdriver, it’s a quick DIY maintenance task.

Follow these steps to change the battery in an ADT motion sensor:

1. Turn Off the Motion Sensor at the Panel

Before opening up the motion sensor, disable it using your ADT alarm panel. This prevents any tamper alerts while you have the sensor open.

Go to your alarm panel and access the zone programming menu. Locate the zone number for that specific motion detector.

Enter that zone number to bring up the configuration options.

Select the option to turn off or bypass the zone. The zone should now show a “disabled” or “bypassed” status.

The sensor is now offline so you can safely change the battery without triggering the alarm.

2. Unscrew the Battery Compartment Cover

Find the small screw or screws securing the battery compartment cover. Use your screwdriver to loosen and remove the cover screw(s).

Set the screws aside in a safe place so you can reuse them to re-secure the cover later.

3. Remove the Depleted Battery

Gently slide the old, depleted battery out of the motion sensor’s battery compartment.

Double check that you have matching replacement batteries on hand before fully removing the dead battery.

4. Insert the New Battery

Pick up the new battery and slide it into the battery compartment, orienting it correctly according to the polarity (+/-) markings.

The battery should click smoothly into place. Avoid forcing it into the compartment.

If you meet resistance, double check that you have the battery facing the right direction.

5. Clean the Lens (Optional)

With the motion sensor open, consider taking a minute to clean the sensor lens inside the detector.

• Use a dry cloth or cotton swab to gently wipe away any dust or debris on the lens surface.
• For more thorough cleaning, moisten the swab with rubbing alcohol or glass cleaner.
• Avoid using harsh chemicals that could damage plastic components.
• Take care not to get any liquid into the battery compartment.

Keeping the lens clean allows the sensor to accurately detect motion and transmit alerts.

6. Close the Battery Compartment

Once the fresh battery is installed, close up the battery compartment cover.

Re-insert all screws and tighten them with your screwdriver to secure the cover in place.

7. Reactivate the Motion Sensor at the Panel

Go back to your alarm panel and re-enable the motion sensor zone you disabled earlier.

The zone status should return to normal, and the motion detector will come back online.

The sensor will run a quick diagnostic test to ensure it’s functioning on the new battery.

The green LED light on the sensor may blink rapidly during this process.

Once complete, the light will return to normal blinking to indicate motion readiness.

The sensor will communicate properly with the panel to detect intruders once again.

And that’s it! With just a few easy steps, you’ve swapped the dead battery for a fresh one in your ADT motion sensor.

Enjoy peace of mind knowing your security system is running at full strength.

Tips for Maximizing ADT Motion Sensor Battery Life

To avoid frequent battery changes, use these tips to help your ADT motion sensor batteries last longer:

• Buy premium batteries – Invest in brand name alkaline batteries recommended for security systems. Avoid cheap batteries that drain quickly.
• Check batteries seasonally – Set bi-annual or quarterly reminders to proactively swap all batteries.
• Use AA batteries for high traffic areas – For motion sensors that activate often, AA batteries may provide more longevity over AAA.
• Turn down motion sensitivity – Sensors that constantly activate due to pets or trees moving can deplete batteries quicker.
• Avoid extreme temperatures – Heat and cold can strain batteries, so keep sensors away from vents, windows, and unheated/uncooled areas.

Taking a few simple steps to optimize your batteries will help your ADT motion sensors run smoothly for longer between changes.

Troubleshooting ADT Motion Sensor Battery Issues

Swapping in a new battery usually resolves any motion sensor issues. But in some cases, you may run into trouble even after a battery change.

Here are a few things to check if your ADT motion sensor isn’t working properly after a new battery:

• Verify correct battery type – Make sure you are using the exact required batteries for that model. Using stronger or weaker batteries than specified could cause problems.
• Check for corrosion – Batteries can corrode over time, preventing good contact with the terminals. Clean any corrosion in the compartment with a cotton swab and rubbing alcohol.
• Ensure good contact – The battery needs to make firm contact with the terminals. If it’s loose, try adjusting the position or switch to a fresh battery.
• Replace the sensor – If issues persist after multiple new batteries, the sensor itself may be faulty. Contact ADT to request a replacement motion sensor.
• Get help – For persistent issues, contact ADT support for troubleshooting help. Their technicians can diagnose any underlying problems.

With some basic troubleshooting, you can get your motion sensor working again after a battery change. Call in reinforcements from ADT if needed.

Next Steps After Replacing an ADT Motion Sensor Battery

Once you’ve successfully swapped in a fresh battery, there are a few next steps to take:

• Test the sensor – Walk in front of the sensor and verify it detects your motion as expected. Confirm it communicates properly with the panel.
• Dispose of spent battery properly – Depleted batteries contain toxic chemicals and should be recycled responsibly. Don’t simply throw them in the trash. Take them to a battery recycling center or hazardous waste collection site.
• Make a battery checklist – To stay organized, make a checklist of all motion sensors and their battery change dates. Refer to it when performing maintenance.
• Set a reminder – Program a reminder on your calendar or phone to replace the motion sensor battery again in 12 months. Consistent reminders make maintenance a breeze.

With the new knowledge of how to swap out an old battery for a new one, you can keep your ADT motion sensors running optimally for maximum home protection.

Key Takeaways on Changing an ADT Motion Sensor Battery

Here are the key tips to remember when changing the battery in your ADT motion detectors:

Why Change Batteries

• Replace when you get a low battery warning
• Swap as routine maintenance every 12 months

Battery Type

• Most models use AAA or AA batteries
• Verify battery type in user manual
• Buy premium alkaline batteries

Steps to Change Battery

1. Disable sensor at panel
2. Remove cover screw(s)
3. Take out old battery
4. Insert matched new battery
5. Clean sensor lens (optional)
6. Replace cover and screws
7. Enable sensor at panel

Troubleshooting Tips

• Confirm correct battery type
• Check for corrosion
• Ensure good battery contact
• If issues persist, replace sensor

Maximize Battery Life

• Buy quality batteries
• Change on a schedule
• Adjust motion sensitivity
• Maintain ideal temperature

FAQs

How Do I Check The Battery On My Adt Sensor?

You can check the battery level on your ADT motion sensor in a couple ways:

• Wait for low battery alert – The sensor will send an alert to the ADT panel when the battery gets low. This lets you know the battery needs to be changed soon.
• Visually inspect – Open up the sensor and visually examine the battery to see if it looks worn or corroded.
• Use a battery tester – Use a device like a battery tester that can measure remaining charge level. This gives you a percentage estimate of battery life left.
• Monitor performance – Watch for signs like fewer activations or delayed alerts that could indicate a low battery.

Routinely checking batteries every 6-12 months ensures you catch low batteries before they fully drain and affect security system performance.

How Long Do Adt Motion Sensor Batteries Last?

ADT motion sensor batteries tend to last around 1 year on average with typical use.

Factors like frequency of motion activations, environmental temperatures, and battery quality can impact lifespan.

More specifically:

• High quality alkaline batteries can last up to 2 years if motion triggers are infrequent.
• Budget batteries may only last 6-9 months with frequent motion activations.
• Hot or cold environments may reduce expected battery lifespan.

To maximize lifespan, buy name-brand batteries, place sensors in moderate temperatures, and reduce unnecessary motion triggers.

Routinely replacing batteries every 12 months is recommended for optimal security system performance.

Do Adt Motion Sensors Have Batteries?

Yes, the vast majority of ADT motion sensors are powered by internal batteries. Specifically:

• Most models use replaceable AAA or AA size alkaline batteries.
• Some newer sensors have built-in lithium coin cell batteries that can’t be replaced.
• A few wired sensors get power directly from the control panel instead.

Battery-powered designs allow flexibility for sensor positioning in your home.

Just check your specific model’s manual to confirm which battery type it uses and when they should be replaced.

What Kind Of Batteries Are In Adt Sensors?

ADT motion sensors typically use common AAA or AA alkaline batteries. Lithium coin cell batteries are also used in some models. Specific battery types include:

• AAA 1.5V alkaline batteries
• AA 1.5V alkaline batteries
• CR123A 3V lithium coin batteries
• CR2450 3V lithium coin batteries

Higher voltage lithium batteries provide longer battery life. But AAA and AA alkalines are inexpensive and easily replaceable. Check your owner’s manual to see which battery type your motion sensor model requires.

How Do You Open An Adt Sensor?

To open an ADT motion sensor and access the battery:

1. Locate the small screw(s) on the sensor housing.
2. Use a screwdriver to loosen and remove the screw(s).
3. Carefully separate the sensor housing to reveal the internal battery compartment.
4. The battery will be visible once the housing is opened.

Remember to disable the sensor at the control panel first to avoid sounding an alarm. Re-tighten the housing and re-enable the sensor when finished.

How Do I Reset My Adt Motion Sensor?

If your ADT motion sensor is malfunctioning or unresponsive, you may need to reset it. Here are two methods:

Hard Reset:

1. Remove the battery for 60 seconds.
2. Reinsert the battery to force the sensor to reboot.

Panel Reset:

1. Access installer programming mode at the control panel.
2. Enter the sensor’s zone number.
3. Select the reset option.

Resetting clears any erroneous settings/signals and reboots the sensor to restore normal operation.

Be sure to test sensor functionality afterwards.

What Battery Is In A Motion Sensor?

Motion sensors typically use AAA, AA, or small lithium coin cell batteries, such as:

• AAA alkaline – Common, inexpensive option for most sensors. Provides 1.5V.
• AA alkaline – Larger capacity for high traffic sensors. Also 1.5V output.
• CR123A – Lithium coin cell that gives 3V with long battery life. Often used in PIR sensors.
• CR2025 or CR2450 – Other lithium coins cells for compact sensors. As small as 20mm diameter.

AAA and AA alkaline batteries are inexpensive, readily available, and easily replaced, making them popular choices to power most motion detectors.

What Happens When Adt Battery Is Low?

Here’s what happens when your ADT security system battery gets low:

• A battery low alert is sent to the control panel when it reaches around 20% charge.
• The panel will beep and show a “low system battery” warning message.
• Voice alerts will also announce the low battery if you have that feature enabled.
• The keypad will flash and the alarm will “chirp” periodically as an audible low battery indicator.
• If the battery is not replaced, the system will eventually lose power when the battery dies completely.

Following battery low alerts right away is crucial to avoid losing security system functionality from a depleted battery.

Where Is The Battery In The Adt System?

The backup battery is usually located inside the main ADT control panel housing. Some common ADT panel battery locations include:

• Behind or under the main circuit board
• Mounted on an inner wall or bracket within the panel case
• Secured into a battery compartment slot
• Connected to a wiring harness within the panel

Larger multi-piece modular ADT systems may have the backup battery housed in a separate power module rather than the main panel.

Check your ADT control panel installation manual for exact battery placement within your specific system model. The wire harness can also be followed back to locate the battery.

When Should I Replace My Adt Battery?

It’s recommended to replace your ADT security system battery every 3-5 years to maintain optimal performance. Reasons to replace include:

• You receive a system low battery alert.
• The battery will not hold a full charge.
• The battery is swelling or looks corroded/damaged.
• It has been around 3 years since last replacement.
• Keypad indicates charger issues.

Following the 3-5 year replacement timeline helps ensure the battery is always in good condition before it fails and causes system disruptions.

How Do I Know If My Adt Battery Is Charging?

To check that your ADT security system battery is charging properly:

• The KEYPAD POWER light will be on steady when charging.
• The keypad display will show “AC” indicating external power.
• The control panel AC power light will also be illuminated.
• Voltage readings can be checked at the panel and battery terminals to confirm charging voltage.
• Test the backup battery monthly. If it only lasts a few hours, the charging system may be faulty.

If any lights are off or flashing, the battery may not be charging correctly, indicating an issue with the panel or charger.

How Do I Stop My Adt Battery From Beeping?

To stop an ADT alarm system battery from beeping when there is a low battery warning:

• Replace the low battery right away with a fresh new one. This is the true solution to stop the beeping.
• Temporarily mute beeps at the keypad, but the beeps will resume periodically until the battery is actually replaced.
• Disconnect just the battery beep wire, but other system fault beeps may still occur. The battery still needs replacement.
• Disable the system’s speaker, however it will lose ability to provide any audible alerts.

The beeping will persist as a crucial alert to replace the low battery. Addressing the root issue by swapping in a fresh battery is the proper way to stop the beeps permanently.

How Do I Know If My Adt Sensor Is Working?

To test if your ADT security system sensor is working properly:

• Trigger the sensor and check that an alert is sent to the panel. Look for the zone light / activity log entry.
• Walk in front of a motion sensor and see if it lights up and responds.
• Open a door/window sensor and verify it shows open on the keypad and app.
• Ensure batteries are not depleted and the sensor LED is blinking once per second when idle.
• Look for any signs of damage, dirt, corrosion that could impair functionality.
• Use panel walk test mode to trigger sensors and confirm they communicate signals.

Routine sensor testing ensures they are monitoring correctly and alerts will be sent to the panel if an intruder is detected.

Conclusion

I hope this detailed guide gives you everything you need to know about changing the battery in your ADT motion sensors.

With the right batteries and just a few minutes, you can swap out a dead battery and keep your security system running strong.

Changing motion sensor batteries regularly is an easy way to protect your home.

You’ll avoid disruptions in intruder detection and can sleep soundly knowing your ADT system is operating at peak performance.

For more helpful home security tips and alarm system maintenance guides, check out the rest of our blog!