the ambient heat less strongly and spend relaxed nights even during the summer. A typical feature of this type of air conditioning is the use of a rechargeable battery or alternatively batteries. These energy sources make it possible to choose the location very flexible. The Polar Chill Portable AC even has a handle for this purpose, which makes it possible to transport the device between rooms as easily as a handbag. However, the use of alternative energy sources makes it necessary to keep an eye on the