4/4/11
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It's a good idea to change the batteries in your smoke detectors at least once a year, no matter if the batteries are dead or not, so that they are always working at their full potential. But don't toss out the batteries when you replace them. Since most of them will still have some juice in them, save them and use them for remote controls, children's toys and other personal electronics. They may not last as long, but you'll definitely be able to get your money's worth by using up all of the energy that's left.