Article 15 1.

For the purposes of compliance and verification of compliance of batteries with the requirements laid down in Articles 9, 10, 12, 13, 14 and 78, tests, measurements and calculations shall be made using reliable, accurate and reproducible methods which take into account the generally recognised state-of-the-art methods, and the results of which are deemed to be of low uncertainty, including methods set out in standards for which references have been published for those purposes in the Official Journal of the European Union.