We spoke to a fire safety expert and weighed the pros and cons of cost, reliability and installation of hardwired smoke alarms versus battery-operated. Here’s everything you need to know.

On April 3, Nest Labs halted sales of the Nest Protect smoke and CO alarm and deactivated the hush feature, called the Nest Wave, over concerns that the alarm could be unintentionally deactivated.

The second-generation Onelink Smart Smoke + Carbon Monoxide alarm comes in battery and hardwired models. Similar to the Nest Protect, the Onelink will not only sound an alarm, but also specify the ...