The folks at WiFiRanger have made available their 12v kit that consists of a special cigarette lighter adapter capable of putting out 5v DC @ 2amps along with a special USB cable that has proper DC jack to plug into back of router. Also included in the kit is a 3ft USB cable for RVers who want to position their USB modem in a window for better cellular reception. The kit sells for $24.95 on their site.
(FYI, because the cigarette lighter adapter puts out 2amps, it should be able to charge pretty much anything that uses 5volts, including power hungry iPads)
