By Todd Bernhard
One of the best use cases of the "Internet of Things" is the ability to track your valuables. Thanks to low-power Bluetooth, you can have a Bluetooth tracking tag attached to your purse, briefcase, wallet, etc., and not worry about changing batteries every month. The Chipolo ($29.95) goes even further. The included coin-size battery lasts for six months, and to be safe, the company includes a second battery, for a total of one year of use. This is a nice touch, because such batteries aren't as easy to find as AA and AAA batteries.