Global automobile manufacturers are building more electric cars every month, sales figures are increasing exponentially - and with it the demand for batteries. They are the most expensive and ecologically controversial component in vehicles. Politicians want the electricity storage systems to be built in Europe instead of Asia. Golden times have dawned for managers of companies that build battery factories here. But it's not as bombproof as the business looks. There are analyzes according to which the capacities of the factories exceed the battery demand as early as 2022.