Over the past couple years, Bluetooth trackers like Tile have become immensely popular with people like me who struggle to keep track of keys and phones. The concept is simple — a small tag that attaches to keys (or anything else) and can be pinged from your phone to help you find it.
Over time, the system has grown better, with longer battery life and more features like community searching for things lost outside your house, and reverse finding that lets you use the Tile to find your phone. But two big limitations have remained: the range of the Bluetooth connection, normally 20-30 feet; and the non-replaceable battery that means you have to shell out for a completely new Tile ever 18 months.
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