Batteries; Battery boxes; Electric cables, wires, conductors and connection fittings therefor; Electrolysers; Grids for batteries; Inspection mirrors; Instruments for measuring length; Measuring rulers; Photovoltaic cells; Solar panels for production of electricity; Workmen's protective face-shields; Control valves for regulating the flow of gases and liquids; Electrical switches; Galvanic batteries; Gasometers; High tension batteries; Power switches; Resistance measuring instruments; Solar b...