Box date vs alarm date: dating sealed-battery stock honestly

Ten-year sealed-battery alarms solved the battery-swap problem and created a paperwork one: the date that matters is the manufacture date printed on the alarm itself, not the date on the shipping box or the purchase invoice. Stock that sat in a supplier's warehouse for two years arrives with eight years of life, and a shelf of it installed across a property expires together. The honest system is simple — log the alarm's own date at install, per unit, and buy in smaller batches more often instead of one giant order. When your supplier's dates arrive short, that is a conversation to have at purchase, not at inspection. How are you logging manufacture dates today? — Otto Mergl, Admin