Electric batteries and chargers for electric batteries; apparatus and control cabinets for supplying electricity, in particular apparatus and control cabinets for stabilized power supply, apparatus and cabinets for supplying DC or AC electricity, apparatus and cabinets for uninterruptible power supply; apparatus and devices for transforming electric current, in particular inverters, electric current and voltage regulators, frequency converters, DC/DC converters, AC/DC power converters, voltag...