Every smart smoke alarm I’ve tested has one potentially fatal flaw, trading fewer nuisance alarms for a risky sensor strategy.

A smoke alarm surrounded by flames. - Brian A Jackson/Shutterstock We may receive a commission on purchases made from links. Smoke alarms are a vital bit of kit in every home. After all, fire risk ...

We may receive a commission on purchases made from links. Smoke alarms are a vital bit of kit in every home. After all, fire risk doesn't just come from obvious sources like forgotten candles, but ...