Hazardous waste container designed to contain battery acids in vertical double-walled polyethylene, with a variable capacity of 290 to 1000 litres. They have a smooth, thick surface, designed to adequately resist spillage. The battery acid tanks have provisions for loading, unloading and total emptying; they are equipped with an upper hatch for inspection and are suitable for containing battery acids. In addition, the hazardous waste container has a level indicator for measuring the liquid inside. The battery containers are available in various sizes and including accessories, with variable diameter and height depending on their capacity.