How do I maintain my smoke alarms?
The Fire & Rescue NSW recommends:
All of your smoke alarms should be tested at least every month to ensure that the battery and the alarm sounder are working.
Every six months
Every six months you should clean your smoke alarm with your vacuum cleaner. This will remove any particles that will hinder smoke alarm performance. If you are using a 9V lead battery you should consider changing it twice a year.
Once a year
If your smoke alarm has removable alkaline battery, you should replace the battery once a year. If your smoke alarm uses a lithium battery it will not need replacing annually as the battery is inbuilt into the alarm and the entire unit will need replacing every ten years.