There are two different types of smoke alarms—single-sensor ionization and single-sensor photoelectric units ... battery-powered units,” he says. Interconnected alarms let you link them ...

The best smoke detector can provide an important first line of defense from fire. We recently put the top smoke detectors to the test. See which ones performed best.

Instead of an electric circuit, photoelectric smoke alarms ... like First Alert’s wireless smoke alarm, use wireless tech to interconnect. They’re easy to install and provide great protection ...