How long does the WanderGuard BLUE Tag battery last, and how often should I check it?
Two battery options are available: a ninety-day battery life and a three-year battery life. It is recommended to use the WanderGuard BLUE Detector to check the Tag battery at least once a week. The ninety-day Tag begins sending a Low battery message two weeks prior to expiration, while the three-year Tag indicates low battery two months before the three-year term ends.
From the official Stanley WanderGuard BLUE Tag Wandering Prevention System manual, page 15
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