Burglar alarm back-up battery replacement guide

Quick guide to understanding your alarm back up battery The following are ALL the key facts you need to know about burglar alarm batteries:

How to turn off power / decommission a burglar alarm
List of all burglar alarm systems / makes / technologies in UK
PIR sensor not working? How to fix
Back_Up_Batteries.png

Quick guide to understanding your alarm back up battery

The following are ALL the key facts you need to know about burglar alarm batteries:

  • All professionally installed alarm systems include a back-up battery in the main alarm panel.
  • Alarm Back-up batteries are normally 12V, and can be 2.1ah, 3.4ah or 7.1ah.
  • A back up battery should last for between 8 to 12 hours, depending on the size of the battery and number of sensors on the system.
  • An alarm battery should last for 4 year. If the battery is not replaced it can cause problems – resulting in complete system failure.

More in-depth user guide

All professionally installed alarm systems include a back-up battery in the main alarm panel. This battery provides power to the alarm in the case of a power cut. Alarm Back-up batteries are normally 12V, and can be 2.1ah, 3.4ah or 7.1ah. Please note, all battery types are compatible with each other – for example, you can swap a 2.1ah with a 7.1ah (as long as there’s enough physical space).

How long does a burglar alarm battery last in a power cut?

A back up battery should last for between 8 to 12 hours, depending on the size of the battery and number of sensors on the system.

When should you change a burglar alarm back-up battery?

A burglar alarm battery should last for 4 to 5 years. If the back-up battery is not replaced it can cause problems to the rest of the alamr – resulting in complete alarm system failure.

How often should you change a wireless alarm sensor battery?

If you have a system with wireless sensors, all of these will have a small battery in them. A wireless sensor battery should be changed every 12 to 24 months, depending on how active the sensor is.

Please note, for energy saving purposes wireless sensors are only active when the alarm system is ‘armed’ – hence why the red light won’t actively flash when you walk around your property.

Watch our alarm battery how to guide

Still, need help?

If you still need help with your alarm, then get in contact with our team to see if we can help you >>

Burglar alarm Tech support

Or if you know you need an engineer then book an ‘on-site visit’ where one of our trained engineers comes out to your site to fix your problem.  Book an engineer visit here  or email us at help@smartsecurity.support

Book alarm engineer visit