10 Year Lifetime with Sealed Battery- The fire alarms smoke detectors‘ battery operated 10- years life time and ues an energy and eco-friendly lithium batterywith low consumption, enabling an ...

“There is a move to a hardwired smoke alarm with a built-in 10-year battery that lasts the life of the alarm and doesn’t require battery changes. Most fire experts just want working smoke ...

【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 ...

Backup power: Hardwired smoke detectors require a backup battery to power the unit in the event of a power outage. These will either use replaceable batteries or permanent 10-year batteries.