Does anyone have any experience using a battery powered personal A/C in their coop to provide some relief from the heat? If so, do you have a product recommendation? I'm thinking specifically of the little portable fans used for camping that use water or ice to cool the air. It would have to be a small footprint--my coop is only 4x6 if you don't count the run. I'm just having a hard time sorting through stuff online because different sellers will use the same images to advertise a fan under different names, wildly different prices, and wildly variable reviews.