How to Replace the Battery in a PIR2 Motion Detector?

Have you had wondered before thinking about how to replace the battery in a PIR2 Motion Detector? Well, wonder no more! This article will guide you to the step-by-step instructions on how to replace the battery. We’ll also talk about what kind of batteries should be used and when it is time for a replacement.

How to replace the battery in a PIR2 Motion Detector?

The PIR2 Motion Detector is an excellent product for people who want to have better security in their homes. A motion sensor is a device that picks up on movement in an area. When it detects motion, the control panel alerts you and your monitoring center to potential threats occurring at home.

If you find your motion detector that has been acting up and not working as it should, it’s possible that the battery just needs replacing. If you follow these steps carefully, you will successfully do motion detector battery replacement with ease.

Step 1: Before you change the batteries, double-check to make sure your system is deactivated and that a beeping sound may come from the control panel as you open a motion sensor.

Step 2: Open the sensor by grasping it with your thumbs on the front and your fingers around the back. Slide the detector off of its backplate by pushing your thumbs upward carefully.

Step 3: Flip the sensor and find the black tab underneath the batteries. Pull the black tab gently to release the old batteries.

Step 4: Insert the new batteries and be sure to follow the correct battery orientation. This device uses two pieces of CR123A batteries.

Step 5: Remount the sensor back by sliding it on its backplate and make sure it fits properly with no gaps.

Don’t forget to activate the system once you’ve successfully replaced the PIR Motion Detector batteries.

Remember to dispose of the old batteries in a proper manner. Never throw them in the trash. You can bring these old batteries to your local recycling center or contact your city’s local government to learn about their battery disposal practice. This way, you didn’t just replace the batteries; you helped to keep your environment safe as well.

Why is the motion detector not working after changing the batteries?

The most common reason for a motion detector not to work is defective batteries. When the batteries are bad, they will not power on any of your detectors. In this case, you will just need to replace the batteries and make sure you are using the correct type of batteries. If changing the batteries doesn’t resolve the issue, contact the manufacturer right away for further support. They will be able to check and diagnose or fix the problem for you if there is something else wrong with it, mainly if the errors fall on any of the following causes:

  • The unit has lost its ability to detect motion.
  • The motion sensor is operating in the wrong mode.
  • There’s physical damage to the device itself.
  • It is also possible that there’s an issue with the wiring or electrical system.

What should be done when the motion sensor malfunctions?

-Make sure that the device is at the appropriate level and that it has adequate coverage in your selected areas.

-Check the wiring connection and make sure that the connection is tight and well hidden.

-Ensure that the right motion sensor is set for a particular area.

-Do a walk test in the daytime to see if the sensor is working properly or giving a false alarm.

-Check that there are no metal objects or electronic devices in the area of coverage as it can interfere with the device’s ability to sense motion.

If you are not sure what to do when your motion sensor malfunctions, you can always reach out to your manufacturer’s customer service department for help. They will be available to assist you with any questions or problems that you may have related to the devices.


The PIR2 Motion Detector is a great device that helps you feel more secure in the comfort of your own home. If you find your motion detector not working properly, it is best to change the batteries right away. Do not prolong the process because the older batteries will drain faster than new ones. Be sure to use the recommended batteries for your device. You can always check the manufacturer’s website for the details on replacement batteries for your device to work on its optimum level.

I hope you learn from this post and found it informative and helpful! Please feel free to share it with your friends and family, especially if they are interested in learning how to replace their PIR2 Motion Detector batteries. Thanks for reading!

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.