You said you couldnt sleep without a fan if the power went out.. I think I have the answer. I have a battery operated fan.. takes 2 D cells. I think I bought it at a truck stop. The brand name is "RoadPro". We lost our power this afternoon and its 91 degrees here in middle tennessee, so I broke out the fan. It worked beautifully. I ran it for 2 straight hrs and it never even slowed down. Might wanna try it. Bet you could get it at any truckstop or online! Good Luck!