Alarm System Battery Replacement Guide

by Jul 1, 2021Safety


If you have a home security system, you will probably hear a beep from the control panel at some point warning you that it’s time to replace the batteries.

This has to be pretty simple, right? You have replaced a few hundred batteries on your day. Well, it is certainly easy enough to replace your alarm system batteries alone without calling in an expert. That said, there are a few steps you will take to get it right.

Step 1: Find out which batteries need to be replaced

Whether it sounds or just flashes some strange lights towards you, your control panel may be the thing that needs new batteries. Then again, the panel can just warn you about the need to switch the power source of your components to your home security system running on batteries.

One of the following may cause a low battery alarm:

  • Smart door lock
  • Smart thermostat
  • Smart smoke / carbon monoxide alarms
  • Door / window sensors
  • Wireless cameras (both indoors and outdoors)

Not sure which part of your home alarm system needs new batteries? Check the manual that came with your system; it should have a guide to error codes that can help you figure out what’s going on.

Step two: Find out what type of battery you need

Some system components run on standard 9 volt or AA battery outputs, requiring a quick drive to the grocery store. Others – such as wireless cameras – come packaged with special lithium batteries that can be recharged right at home. Check to see if there is a battery door that can be pushed open to see the existing batteries.

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No luck? It is probably time to call the company that installed the equipment or check in with the manufacturer. Make sure you have the make and model number on hand so that the customer service representative at the other end of your call can find exactly what battery you need.

Step three: Call your monitoring company

If you pay a company for regular monitoring and you have not already called them to confirm the battery type, now is the time to hop on the phone. Replacing the battery may knock the component offline for a short time or cause an alarm to be tampered with. Letting them know in advance that you’re just making a battery change prevents a call from them or a police officer from showing up in front of your front door.

Step four: Install the battery

This should be the easy part, especially if you have already seen the battery panel. If you run into problems, check your security company’s website for instructions (or call them).

Step five: Run a test.

Once the battery is in place, call your monitoring company (if you have one) to have them ready. They can guide you through a test to make sure everything was installed correctly (and you do not end up with a dud battery in any way). If you do not have a monitoring company, check your manual or the manufacturer’s website for steps to run a test.

Bottom line

All makes and models of the home security system are different, so home alarm batteries can last longer in some systems, shorter in others. However, as long as you keep an eye on alarms, you need to be able to keep your home system running.

Officer James Banta

Officer Banta is the official security expert in the field of home security and safety. As a member of the Biloxi Police Department for over 24 years, Officer Banta reviews all articles before giving his stamp of approval. Click here for more information on Officer Banta and the rest of our team.

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