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The iPhone 8 supports USB-PD protocol fast charging, which can be quickly charged up to 50% in about 30 minutes. However, the iPhone 8 to achieve fast charging requires the use of the USB-PD protocol fast charging head and USB-C to Lightning charging cable, both of which are not standard and need to be purchased separately.
The IPhone8 actually supports the fast charge function, but when charging, due to the low power of the official matching charging head, you need to buy other charging heads to use
Support, according to Apple's official conference ppt show, Apple 8 can support fast charging, but with the official PD fast charging head can achieve fast charging. thank you