My ESL 523CS smoke detector with heat. According to the manual, the detector is made from 1981. Had to repost, because of the pictures were not big enough. : r/firealarms
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My ESL 523CS smoke detector with heat. According to the manual, the detector is made from 1981. Had to repost, because of the pictures were not big enough. : r/firealarms
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What model is this and how do I replace it's battery? : r/firealarms
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