The Chillwell 2.0 is not an AC unit as they claim. The so-called portable AC unit is a swamp cooler. I ordered 2 Chillwell 2.0 units and the units I received were not battery-powered as advertised, but had to be plugged in to operate. In addition, they operated on "water curtains" which had to be filled with water and then placed in the freezer before inserting into the unit, rather than filling the unit with water as advertised.