Next weekend Daylight Savings Time will start at 2:00am on Sunday. You know what that means! Time to change your smoke alarm batteries (and change your clocks). But, did you know that smoke detectors should be replaced every 10 years? Check yours now to see if they need to be replaced so you're ready to go next week. Almost every hardware or department store carries a variety of detectors, and many now include a permanent battery that will last the full 10 years.