Treeseeker....after 04, my second fan purchase was very similar to the one pictured, except that it has a 6 D cell battery pack (9v)..I tried it with a 12v cigarette plug and didn't seem to mind the added voltage, so added a female tubular cigarette adapter ending in terminal clips for a 12v auto battery ...powered it off a partially charged Harley Davidson and auto battery for 05...I've been on the fan quest for several years, as my bedroom window is an old Florida design called an awning crank out and won't hold a window AC to use with the generator...