Do you ever wonder how much power your TV, microwave, or cell charger uses, and how much that costs you? The Belkin Conserve Insight ($30) is a new, easy-to-use monitor that will tell you exactly that. The white and green adapter plugs in the wall between the gadget or appliance you want to track and the outlet itself, using a small screen on a tethered box to tell you how much energy the attached device is using, as well as the carbon and monetary costs.
