300
Fire depts encourage doing this on the day Daylight Saving Time begins. ...a) having a fire drill, ...b) checking home fire extinguishers, ...c) changing batteries in smoke detector, ...d) practicing “Stop. Drop and Roll.”
What is changing batteries in the smoke detector?
A working smoke detector more than doubles a person’s chances of surviving a home fire. More than 90% of homes in US have them but about 1/3 est. to have dead batteries.