Finally, there is a gadget designed for airplanes that actually has some use to it and can be functional. The InFlight Power USB can charge any USB-chargeable device using the standard 1/8-inch headphone jack found in most airplanes around the world. It works by trickle charging the adapter and then dumping all of that built up charge to the attached device. Each full trickle charge takes three to five minutes. Rinse, repeat. Now that flight halfway across the world to meet your favorite Beijing hooker won't seem like such a long trek. $35.