The compatibility of Huawei Rubik's Cube socket and Redmi k40 should be no problem. Because the Huawei Rubik's Cube socket is generally designed with a standard jack and power plug, and the Redmi k40 also supports a standard charging interface, the two can generally be matched. However, it should be noted that when using, it is necessary to first confirm whether the rated voltage and current of the socket and power supply can normally meet the charging needs of the Red rice k40 to avoid problems such as insufficient charging and damage to the equipment.