A new Maryland state law requiring long-life batteries in smoke alarms takes effect on January 1, 2018. A document from Montgomery County government outlines the changes required of homeowners. According to the document, homeowners must: 1. Replace battery-only operated smoke alarms with units powered by sealed- in, ten-year/long-life batteries with a “silence/hush” feature. 2. Upgrade … Continue reading Starting January 1, Maryland Law Requires Ten-Year/Long-Life Batteries in All Battery-Only Smoke Alarms