Black and Decker Simple Start

I saw the commercial for this Black and Decker Simple Start Vehicle Battery Booster the other day.  My first thought was, "What a total chick gadget" followed shortly by "... but damn, what a good idea".  If you haven't seen the commercial, the product is a battery charger that will boost your car's battery through the inside DC outlet (cigarette lighter).  That's right, no jumper cables, no second car, you don't even have to get out of the driver's seat!  It fits into your glove compartment (assuming you get rid of all junk you currently keep in there) and it can be used as a flashlight or to charge your cell phone in case of emergency.  Sigh, I can already hear my future children mocking me.. you used to do what under the hood?