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How to Change the Battery in a Honeywell Alarm System

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

If you have a Honeywell alarm system in your home, you may need to change the battery from time to time. Here’s a quick guide on how to do it.


It is important to properly prepare before changing the battery in a Honeywell alarm system. You will be dealing with electricity, so make sure to switch off the power and unplug any cables connected to the alarm system. When handling the battery, be sure to take all safety precautions, such as wearing protective gloves. Gather all the tools you need before beginning the process. This will ensure that you have a smooth and successful experience.

Gather the necessary tools and materials

Before beginning the replacement of the battery in a Honeywell alarm system, it is important to ensure that you have all the necessary tools and materials prepared. The specific tools and materials required can vary depending on the model of Honeywell system being worked on, so make sure to check your manual or user guide before proceeding. In general, you should have a replacement lithium-ion battery that matches the requirements for your specific system and a Phillips-head screwdriver. Also, it is often recommended to clear some space around the affected device in order to easily access components like screws or cards without running out of room. Once all these items are gathered, the actual replacement process can begin.

Locate the alarm system

Before you start to change the battery in your Honeywell alarm system, it is important to first locate exactly where the system is housed. Depending on the system, it may be located inside or outside of your home.

If your Honeywell alarm system is located outside, you will need to first identify the exact location of the box that houses your panel and other sensors. You can do this by looking at wiring diagrams or by visually inspecting the electrical line leading up to it. The outdoor panel typically includes a small, beige box with a transparent plastic lid – make sure to take note of its exact location, as you will need access in order to complete the battery change.

If the system is located inside, it is likely installed on an inner wall close to an entryway such as a door or window; take note of its exact location for easy access later on. Additionally, there may be other related devices around your home that require their own separate batteries which must also be changed. In most cases these are motion detectors and carbon monoxide sensors which are usually located in hallways and kitchens respectively; make sure not to overlook them when changing out batteries!

Disconnect the Alarm System

Changing the battery in a Honeywell Alarm System requires you to properly disconnect the system from the power source. This ensures that you don’t get hurt or damage the system while working on it. It’s important to make sure you follow the instructions for your specific system. In this section, we’ll discuss how to properly disconnect the Honeywell Alarm System.

Shut off the power

It is important to always shut off the power to your alarm system before attempting any type of servicing or maintenance. To disconnect the alarm system from power, locate the circuit breaker that powers to the alarm system and switch it off. It is advisable to leave it off until you have finished installing the new battery and restoring all connections. If you are unsure which circuit breaker controls the power, contact a qualified electrician as incorrect use of electricity can cause fires, damage and personal injury.

Remove the alarm system cover

Whether replacing a battery or testing the existing one in place to ensure it is still working, the alarm system cover needs to be removed first. This will give you access to the battery, as well as any other components inside that you may need to reach. To do this, locate the cover and if it is secured by screws, use a screwdriver or drill bit sized appropriately for the head of those screws. If instead it is secured with under-sink clips, remove them carefully from the outermost edge of the cover. Once those are removed, gently lift off the cover and set it aside somewhere safe and out of your work area.

Disconnect the battery

Before you disconnect the battery, you need to make sure that the system is disabled or turned off. Most Honeywell alarm systems have a main control panel located near where the battery is installed. To turn off the system and prevent any false alarms, locate the main control panel, enter your security code, and turn off all of the sensors. Once you’ve done this, locate the alarm battery based on your model specifications, usually located in an accessible area such as in a ceiling corner or in a cabinet near an entrance.

The next step is to disconnect the battery from its terminals, usually red (+) and black (-). Depending on your model of system and type of battery holder it may be necessary to use a screwdriver to loosen battery clamps from their terminals so that they can be removed from their holders. If a backup battery holder is present next to the primary one, these steps should also be repeated with it. Finally, once all batteries are disconnected properly place them nearby and dispose them as necessary depending on safety regulations in your area.

Install the New Battery

When the time comes to change the battery of your Honeywell alarm system, the process is fairly straightforward. To start the process, you will need to find the battery compartment in your system and disconnect the old battery from it. Once the old battery has been disconnected, you can install the new one. This article will explain the steps you need to take to change the battery in your Honeywell alarm system.

Connect the new battery

To complete the installation of the new battery, you will need to connect the terminals of the new battery to their respective connections. First, identify which terminal on your alarm system is for positive and which is for negative. On most Honeywell models, these are usually labeled as “Pos” and “Neg” respectively. Connect the positive terminal of your new battery to the positive terminal on your alarm system using a sturdy wire or similar insulated material. Then connect the negative terminal on your new battery to its counterpart on the alarm system.

Once both terminals are connected, hold down any program buttons beside or under the cover of your system until all lights begin flashing in sync with one another. This will indicate that your new battery has been properly connected and that your Honeywell alarm system is online once again. Now test all functions by setting off alarms and monitoring their responses as necessary to ensure that everything is in working order before finally replacing any covers or panels you removed in order to access the terminals.

Secure the new battery

Once the old battery has been removed, you will be ready to install the new battery. Before doing so, take a moment to inspect the contacts of both battery and cable for corrosion or dirt. Use a cotton swab and rubbing alcohol to clean them if necessary. Connect the positive terminal of the new battery (the red one) to the positive terminal on the alarm panel first, then connect the negative terminal.

Make sure that both batteries are firmly connected, as any disruption in power could cause your system to fail or become damaged. You can use electrical tape or cable ties to ensure that both connections remain secure and steady. Once you have verified that all connections are correct, securely attach any barriers shielding either of your batteries and replace your system’s cover.

Test the System

Testing the system after changing the battery in your Honeywell alarm is essential to make sure that the system is working correctly. This is an important step that should not be overlooked. Starting with a test will help you find out if the battery is working correctly and if the system is correctly detecting any problems in the alarm system. Let’s discuss how to test the system.

Re-connect the power

After the new battery has been installed in your Honeywell Alarm System, you will need to re-connect the power. This simply requires plugging the transformer back into an electrical socket. Once you have done this, you should get a green light on the control panel.

To ensure that all of your settings are still intact and that the system is working properly, it is important to test it out. The best way to do this is by activating the panic feature on your keypad. Press and hold both Panic buttons for approximately 5 seconds. The control panel should then sound its siren and activate any connected devices such as lights or remote sensors. If these work correctly, your system has successfully been reset with your new battery and can now be used again without interruption or false alarms.

Test the system

Testing the system is an integral part of changing the battery in your Honeywell alarm system. After replacing the new battery, you will need to test it to make sure that it is working properly. Here are some basic steps for testing the system:

1. Put your Honeywell alarm system in ‘test mode’. You can do this by pressing and holding the ‘Test’ button on your alarm’s control panel.
2. Once you are able to activate and deactivate test mode, you can start testing the various components within your system to ensure that they all work properly with the new battery.
3. Begin with doors and windows; open and close them one by one while checking that the alarm sound activates when opened or closed as expected.
4. Next, check smoke detectors; verify that they detect smoke whenever smoke is released in their proximity, resulting in an alarm sound activation (if applicable).
5. Finally, test motion sensors; look for sensor detections as required when an object enters its detection range (if applicable).

Final Steps

Congratulations! You have successfully changed the battery in your Honeywell alarm system. The final step to completing the battery change is to test the alarm and reset the panel. Do a test run of the alarm to make sure that everything is running correctly. After that, you will need to reset the alarm panel to make sure that the settings are up to date. Let’s review the steps for testing the alarm and resetting the panel.

Replace the alarm system cover

After you have successfully removed the old battery, it’s time to complete the process. First, you should replace the cover of your alarm system. There should be a door located at the back of your system with a locking mechanism; make sure to use your key or combination to unlock this door. Once you have done this, take out your new battery and insert it into the correct slot in the system. Replace the cover and ensure that it is securely locked into place.

You are now ready to begin programming your alarm system once more! Before turning on your system, carefully review all settings and control functions like buttons and arming/disarming processes. Make sure that each component has been installed correctly before testing out any new additions to your security setup. Your Honeywell Alarm System is now ready for use!

Reset the system

The final step in changing the battery in a Honeywell alarm system is to reset the system. It is important to reset the system after replacing outdated or malfunctioning batteries with new ones. In order to reset the system, follow these steps:

1. Power on the system by following the instructions in your user’s manual.
2. Enter your individual code into the keypad and press “Enter.”
3. Press “Reset” at the prompt on your keypad.
4. The system will then indicate that it is resetting and display “System Reset” on its display panel when done.
5. Test each alarm device (smoke detectors, motion detectors, etc.) one last time as a final check before restoring power if necessary to ensure that everything works properly and all alarms are triggered correctly when needed.
6. Finally, power down or disconnect the battery for five minutes before reconnecting, which will finally complete all of the necessary reset steps for a successful battery change-out in a Honeywell alarm system!

How to Change the Battery in a Honeywell Alarm SystemCheckout this video:

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