I posted about this a long time ago but O2 cool makes a battery powered AC unit.
1. Icy Breeze - With Ice Added
Lowers Air Temperature up to 30 degrees
(Air Conditioning feature requires ice for use)
2. Water Mister
Cool Evaporating Mist Feature
3. Powerful Fan
Strong, Cool Breeze with or without Ice
( I have used it with ICE as well as 50% Ice 50% dry ice)
Includes AC Adapter.
Requires 8 D cell batteries for remote use.
www.batterysavers.com/person-aircondi.htm
( This is just one place that sells it I have seen it as low as $60 to $130)
