Motion Sensor Battery Life
From X10Wiki
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Question
How long do the batteries last?
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Answer
Battery life can vary depending on the brand and the level of activity in the area the motion sensor protects. Most batteries will last anywhere from 3 to 12 months. In a high traffic area, changing the batteries every 3 to 4 months is a good idea. If little movement occurs, then they do not need to be changed as often. One recommendation is to replace them during Daylight Savings just as you do with a smoke detector.
Remember, whenever you remove the batteries, it will reset a home automation motion sensor to A1, and a security motion sensor needs to be re-initialized.
