A: PD fast charge protocol is what PD full name should be called USB Power Delivery Specification, is a USB standardization organization launched a fast charging standard. This fast charge standard has been running for a few years, USB PD has now reached the version of 3.0, and the PD fast charge we are talking about now usually refers to PS 3.0. The iPhone 8 and iPhone X support the PD3.0 protocol.