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Review title: Nice detector but one defective
Product review: These seem well made and are easy to install. Bought and installed three but after 5 minutes or so, one of them started sounding the low battery warning. Went out and spent $5 on a new battery just to find out, the warning still goes off. Can't just get replacement; have to spend an extra $2 to buy new one and send this one back for refund. I love Amazon but this is a pain.
