Winner: Hardwired with 10-year backup battery operation wins this round. The post Hardwired vs Battery Smoke Detector: Important Differences appeared first on Family Handyman.

Backup power: Hardwired smoke detectors require a backup battery to power the unit in the event of a power outage. These will either use replaceable batteries or permanent 10-year batteries.

Siterwell Smoke & Carbon Monoxide Detectors ... Life Battery The wireless model includes a built-in 10-year lithium battery, giving you a decade of maintenance-free operation. The hardwired ...