Smoke alarms, whether smart or traditional, are typically said to have a life expectancy of up to ten years. This is because the sensors attached to the alarms usually wear out by then, so to continue working effectively, they must be replaced. It’s important to note that these ten years must be dated from the manufacturing date, not the installation date. If your smart smoke alarm has no label specifying this, it’s better to replace it with a new one just to be sure.