I had read some not-great reviews about a lot of battery fans on a few different forums. Unfortunately, when I set off on my journey to Colorado from Florida I didn't think about how darn hot it would be between the two places, and only looked at the weather in Colorado, whoops. First night of the trip I had high 80's around 10 at night while setting up the tent. The only place I could find a camp fan was at REI when I reached Boulder, so I grabbed it. Does it move a huge amount of air, no. Are those batteries stupid expensive, yup, but it it did it's job and kept me relatively comfortable.
I would have liked to find a rechargeable version, preferably one that could recharge using a USB, but this was really all they had. I haven't seen a company that sells a "great" camp fan, which I find really weird. Camping companies make Gucci everything else, and no one has stepped up to make a decent camp fan.