Batteries and accumulators can contain substances harmful to humans and the environment. Examples of these are: zinc, cadmium, mercury and lead. Yet, they also contain precious and recyclable raw materials (lead itself, nickel, rare earths, lithium, iron, zinc, manganese) which, if properly treated, can be recovered and re-used creating new resources and new products, such as photovoltaic panels, new batteries, car number plates and much more. Which means, for example, that for every ton of alkaline batteries collected and properly treated, over 300 kgs of zinc and 250 kgs of iron and nickel can be recovered.
In order to allow recycling of such waste, a separate collection and proper treatment are required.