How Often Do You Change Batteries In Smoke Detectors. Some newer smoke alarms have a sealed lithium power supply that lasts the life of the alarm 10 years. Consumer Product Commission recommends that you check your smoke detector batteries once a month.
Smoke detectors need to be replaced every 10 years and smoke detector batteries should be. Now you can often get 10-year sealed battery smoke and CO combination detectors. N ewer smoke alarms keep some errors in the processor.
All smoke detectors including hard wired units should be replaced every ten years.
Remove the smoke detector from the ceiling in a safe manner. If the landlord is uncertain check the unit itself for date of manufacture. Consumer Product Commission recommends that you check your smoke detector batteries once a month. Pros recommend changing hardwired smoke alarms after 10 years.
