It Is Not the Batteries! Smoke Alarm Presence and Functionality 5 to 7 Years Postinstallation of Sealed Lithium Battery Alarms.

Smoke alarms with lithium batteries have been marketed as long life or "10-Year Alarms." Previous work has drawn into question the actual term of functionality for lithium battery alarms. This article reports on observed smoke alarm presence and functionality in a sample of 158 homes that had participated in a fire department smoke alarm installation program 5 to 7 years prior to the observations. A total of 391 alarms were originally installed in the 158 homes that completed the revisit. At the time of the revisit, 217 of those alarms were working (54%), 28 were nonworking (7%), and 146 were missing (39%). Of the 158 homes that completed the revisit, n = 62 (39%) had all their originally installed project alarms up and working at the revisit. Respondents who reported owning their homes or who reported living in their home for 6 or more years were significantly more likely to maintain all of their project alarms than renters or those living in their homes for 5 or fewer years. Smoke alarm installation programs should consider revisiting homes within 5 to 7 years postinstallation to inspect and replace any missing or nonfunctioning alarms. We recommend programs conducting community risk reduction programs track and plan installations and revisits to improve smoke alarm coverage.