IEC 62684:2018 specifies the interoperability of common external power supplies for use with data-enabled mobile telephones. It defines the common charging capability and specifies interface requirements for the external power supply. Safety and EMC aspects are not covered by this document. Safety is covered by IEC 60950-1 or IEC 62368-1 and EMC is covered by regional /national standards. This document defines interoperability based on legacy USB technologies and does not cover charging interfaces that implement IEC 62680-1-3, IEC 62680-1-2 and IEC 63002. This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:a) Clause 1 is modified to include updated references to IEC Universal Serial Bus interface standards;b) Clause 2 is expanded to include references to IEC Universal Serial Bus interface standards;c) Subclause 4.1 is expanded to include requirements for non USB Micro-B plug DC plug connectors;d) Subclause 4.4 is modified to remove obsolete requirements for common mode noise and reference requirements of IEC Universal Serial Bus interface standards;e) Subclause 4.5 is modified to reference appropriate safety standards.