How long does the WanderGuard BLUE Tag battery last, and when does it give a low battery warning?

Two types of WanderGuard BLUE Tags are available: a ninety-day battery life version and a three-year battery life version. The ninety-day Tag begins sending a Low battery message to the Detector two weeks prior to the 90-day expiration date, while the three-year Tag indicates low battery two months prior to the three-year term. Battery lifetime is guaranteed only if the Tag was activated prior to the 'Activated By' date listed on the back label. (Page 15)