IEC 62885-4:2020+AMD1:2023 is applicable to measurements of the performance of cordless dry vacuum cleaners for household use or under conditions similar to those in households. The results obtained under this document are intended to be comparable to the results obtained under IEC 62885-2 for mains-connected vacuums. The purpose of this document is to specify essential performance characteristics of cordless dry vacuum cleaners which are of interest to users and to describe methods for measuring these characteristics. This standard is to be read in conjunction with IEC 62885-2:2016, to which it refers, and which is applicable unless otherwise specified in this standard.