It is very important to protect your home with a smoke alarm, but it is also important to understand the different power options. Modern technology has improved the reliability of smoke alarms and there are now options beyond just battery-operated devices.
Battery-Powered Alarms
The most basic smoke alarms run on 9-volt batteries and they can be installed anywhere without wiring, but they do need yearly battery changes. The main drawback of them is the lack of a backup power source, which means if the battery fails, you are left unprotected. Remember to also look out for the fire safety symbols that show the smoke alarm is safe
Hardwired Systems
Hardwired smoke alarms connect to your home’s mains power (240V) and include a 9-volt battery backup. This dual power source is much more reliable, as you are protected even during power cuts. However, you will still need to replace the backup battery annually. The installation must also be done by a qualified electrician. If you need an Exeter electrician for smoke alarm installation, firms such as https://www.slelectricals.co.uk/ can help.
Modern Lithium Ion Solutions
The latest development in smoke alarm technology uses long-lasting lithium ion batteries. These units can operate for up to ten years without battery replacement, which matches the recommended lifespan of the smoke alarm itself. They come in two different options:
Hardwired with Rechargeable Battery – These units combine mains power with a rechargeable lithium ion battery backup. While they are more expensive, they remove the need for battery changes and the dual power source makes them very reliable.
Lithium Battery Only – These alarms have the convenience of a ten-year battery life without requiring a mains power connection. While they are easier to install than hardwired versions, they do rely on a single power source which may be seen as less reliable.
The smoke alarm you choose will often depend on your circumstances. For new builds or renovations, hardwired systems with rechargeable batteries are most reliable. For homes where rewiring is difficult, a ten-year lithium battery smoke alarm is a good alternative.