Headrest Powerworks car adapter

What It Is: As gadget-laden consumers rely more on their car batteries to power up, two-prong power outlets and strips like the ones found in homes are cropping up in cars.

How to Get It: The 2007 Jeep Compass offers an optional 115-volt two-prong AC electricity outlet hidden under the front seat center console between the driver and passenger seats. (The typical voltage of a household socket is 120-volts.)
The 2008 Mercury Hybrid Mariner has an optional 110-volt socket in front of the shift control. The 2007 VW Touareg's rear-cargo section features child-proofed outlets (a 115-volt AC and a 12-volt DC). Honda's Odyssey minivan also offers a 115-volt AC covered power outlet in the third row section.
For vehicles without built-in outlets, the Headrest Powerworks power inverter plugs into any 12-volt outlet and provides 110-volt power; it has straps that allow the strip to hang off the back of the front seat for backseat typing. The Xantrex Technologies XPower Pocket also plugs into a 12-volt DC outlet; it powers one 115-volt AC outlet and a USB port.

Full article continued at The Wall Street Journal: Reinventing the Wheel.