ISO 19453-6 is a standard for environmental conditions and testing of lithium-ion traction battery packs and systems used in electric, hybrid and fuel cell electric road vehicles. The document describes the most relevant environmental stresses associated with traction battery packs and specifies test conditions and boundaries. The standard establishes the classification of battery packs and defines test requirements at different stress levels, with the aim of assessing the Reliability of battery packs in vehicles through standardized testing procedures. In addition, it provides test information for different voltage classes (e.g. Class A and Class B) of battery packs, providing manufacturers and users with a basis for systems to define and apply internationally recognized environmental conditions.