At Amazon, get this X-Sense Smoke Detector for $17. That’s a buck less than what Home Depot charges. It runs on a built-in lithium battery rated for up to 10 years, so there’s no need to swap batteries regularly, and it’s ETL listed and tested to meet the UL 217 safety standard. Buy Now at Amazon
Features
Built-in lithium battery lasts up to 10 years ETL listed and tested to meet the UL 217 safety standard Photoelectric sensor helps reduce false alarms from cooking or steam Includes self-test monitoring and a test/silence button No-wire installation with included mounting screws Measures 3.7″ x 1.2″ x 3.7″ and weighs 8.4 oz.
