Duracell DC to AC inverter car charger is probably the best $30 I have spent plus it comes with a USB port for charging your USB gadgets such as an iPod.
I’ve done a road test a bunch of times, taking it with me on road trips to Los Angeles, Santa Barbara, and even now, I am actually blogging from my Eee PC netbook while its being charged via the Duracell inverter.
These inverters are the BEST in the world
