As an affordable option with a long 10-year shelf life, 9-volt batteries have been the battery of choice for smoke alarms for a long time. The life span of a 9V battery depends on the quality and ...

Every smoke detector included below has an average user ... There’s a single test-and-silence button, and the backup 9-volt battery (installed on the side of the unit with a tamper-resistant ...

【10-YEAR LIFETIME with 1-YEAR 9V REPLACEABLE BATTERY】Jemay smoke alarm comes with an impressive ten-year lifespan, guaranteeing steadfast protection. Powered by a replaceable 9V ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.

“If it has a 9-volt battery, it needs to be changed ... Sometimes, however, the smoke detector continues making the same chirpy sound even after you change the battery.