3 ms·

Here's a very common battery-only smoke detector: http://www.homedepot.com/p/First-Alert-Battery-Operated-Photoelectric-Smoke-Alarm-with-Escape-Light-SA720CN/20

by smackfu 13y ago

Here's a very common battery-only smoke detector: http://www.homedepot.com/p/First-Alert-Battery-Operated-Photoelectric-Smoke-Alarm-with-Escape-Light-SA720CN/202433889#.UlREsoZwrEU http://www.homedepot.com/p/First-Alert-Battery-Operated-Phot...