> built-in battery designed to last up to 10 years Good luck with that. I have yet to see any of those make it past 10 weeks, let alone 10 months. And when t

> built-in battery designed to last up to 10 years Good luck with that. I have yet to see any of those make it past 10 weeks, let alone 10 months. And when they false alarm, you have to destroy the device to turn it off.