IEC 62485-3:2014 applies to secondary batteries and battery installations used for electric vehicles, e.g. in electric industrial trucks (including lift trucks, tow trucks, cleaning machines, automatic guided vehicles), in battery powered locomotives, in electric vehicles (e.g. goods vehicles, golf carts, bicycles, wheelchairs), and does not cover the design of such vehicles. It provides requirements on safety aspects associated with the installation, use, inspection, maintenance and disposal of batteries. This edition includes the following significant technical changes with respect to the previous edition: a) a comprehensive revision of Clause 6, presenting a unified and changed formula for the calculation of the required ventilation air flow during battery charging; b) addition of requirements for properties of floor material and battery changing equipment in Clause 9.