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USB Power Meter Tells You Which Devices Will Kill Your Laptop's Battery

When you're traveling and away from a reliable power source, conserving your laptop's battery is of the utmost importance. And knowing which of your USB accessories draws the most juice thanks to this simple $31 power meter—whether it's a wireless adapter, an external drive, or even your phone—will help you max out… » 6/19/13 11:46am 6/19/13 11:46am