My alarm system is approaching three years and the motion sensor already failed once. Are the system batteries replaced only by the TW service people or can one replace them? If so, what are the battery types for the door sensors and the motion sensor?
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Spectrum-Social Media Customer Care
wireless sensors cannot be used where temperatures drop below 20 degrees, Lithium batteries just won't hold up and are destroyed in a year.
Some are using a standard single cell easily replaceable battery.
CR123 is most common, was used in older digital cameras.
Life is only 3 years in a 40-80 degree operating enviornment