ATTN: Landlords
Under a new law (California State Fire Marshal Information Bulletin 12-08) effect Jan. 1, 2014, Rental property owners need to install smoke detectors that can keep working on the same battery for 10 years or more.
http://osfm.fire.ca.gov/informationbulletin/pdf/2012/12-08_SB-1394Smoke_Alarm.pdf