Mains-powered smoke alarms, also known as hard-wired smoke alarms, are connected to your home’s electrical system and also include a backup battery, typically a 9V or 10-year lithium battery. This ensures continuous operation even during power outages. These alarms require professional installation by a licensed electrician.
Key features of mains-powered smoke alarms:
Dual power source: They operate on both mains electricity and a backup battery.
Reliability: The battery backup ensures the alarm functions even during power outages.
Interconnectivity: Many models can be interconnected, meaning if one alarm detects smoke, all interconnected alarms in the building will sound.
Professional installation: Mains-powered alarms need to be installed by a licensed electrician.
Battery replacement: Some models with 9V batteries require periodic replacement of the backup battery, while others have sealed-in lithium batteries that last for 10 years.
Replacement: Regardless of the power source, smoke alarms should be replaced every 10 years.
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