This International Standard 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 International Standard. Safety is covered by IEC 60950-1or IEC 62368-1 and EMC is covered by regional / national standards. This International standard defines interoperability based on legacy USB technologies and does not cover charging interfaces that implement the USB Type-C"! technology (which is covered by IEC 62680-1-3 (USB Type-C), IEC 62680-1-2 (USB PD) and IEC 63002 (Identification and Communication Interoperability Method for External Power Supplies Used With Portable Computing Devices)).