Cooling batteries are used to support any cool box or even the refrigerator in a caravan or motor home. They store cold until a certain time and thus delay the warming of the box. The most effective way to freeze the batteries is in your home freezer and put them in the box. The performance of the cool box is thus increased. The flexible models are often easier to store. By the way, these cooling batteries are also very suitable if an insect bite or a bruise requires cooling...
