They both generally have a long-lasting and reliable charge with ... Generally, the best 9v battery for a smoke detector may last anywhere from 6 months to 2 years. Meanwhile, 9V lithium batteries ...

Firex is a line of smoke and fire safety products developed by Kidde. Firex is known for its devices’ long-lasting ... 10 years; battery-powered Firex smoke detectors are built to last 10 ...