I thought fast charging and quick charging was the same, but I researched them and found that these two are not the same. Quick Charge is a Qualcomm-developed proprietary battery charging protocol for regulating power delivered via USB, mostly via talking with the power supply and negotiating a voltage.
Xiaomi Mi Max Prime has a quick charging capability but not a fast charging feature. This phone takes approximately 2.5 hours to get a full charge with the stock charger. Qualcomm says this phone is on the list of quick charging, but Xiaomi says nothing about this compatibility.