Meet the GreenFan: a cordless fan with a rechargeable battery that can last you up to 20 hours. You can charge it using a dock charger that the fan ships with. After your fan is fully charged, you can take it with you around your home or even outside. There is no need to worry about cables or anything else for that matter. You do get a remote with your purchase, which allows you to adjust the speed or direction of the head.
This fan’s head oscillates much wider than your conventional fans. It only uses 1.5W of energy, so it is energy efficient. It weighs 4.1kg and has a 4500 mAh battery. Not sure where you can get it in the U.S., but the idea has a lot of potential.