HUAWEI, HONOR FastCharge Protocol (FCP), SuperCharge Protocol (SCP)

Huawei and HONOR use their own charging protocols: FastCharge Protocol (FCP) and SuperCharge Protocol (SCP). Huawei FCP has since been succeeded by SCP.

The FCP charging protocol was released by Huawei in 2015 with a charging power of 18W. Its charging approach is similar to QC 2.0. In 2016, the first generation of SCP was released with increased power of 22.5W. Two years later, in 2018, Huawei released SCP Gen. 2 with a power output of 40W, later increased to 66W. Original second-generation Huawei SCP chargers are backward compatible with older charging protocol generations, including FCP.

Charging protocols:

FCP (20W) - 9V2A, 10V2A (model HW-100200C00) - MicroUSB, USB-C. There is information that FCP supports 12V2A, but I have not been able to find any Huawei devices that support FCP-24W.
SCP Gen.1 (22.5W) - 4.5V/5A, 5V/4.5A, 10V/2.25A. A 5A USB-A - USB-C cable is required.
SCP Gen.2 (66W) - 10V/2.5A, 10V/3A, 5V/8A, 10V/4A, 11V/5A, 20V2A, 20V/3.25A, 11V/6A, 3.4-21V6A. A 6A cable is required: USB-A - USB-C or USB-C - USB-C, depending on the charger version.
SCP (80W): 11V/6A, 10V/4A, 10V/2.25A, 5V/4.5A, 9V/2A, 20V/4A. A 5A USB-A - USB-C cable is required.
SCP (88W): 5V/3A, 9V/3A, 10V/4A, 12V/3A, 15V/3A, 20V/4.4A. A USB-C cable is required.
Huawei/HONOR SuperCharge (100W) - 11V/6A, 10V/4A, 10V/2.25A, 10V/2A, 20V5A. A 6A cable is required: USB-A - USB-C or USB-C - USB-C, depending on the charger version.
SCP (100W): 3.4-21V, supported by the Huawei HW-200500C03 charging adapter.
SCP (120W): 5.5-20V/0.3-6A, supported by the HONOR HN-200600C00 charging adapter (USB-A).
SCP (127W): 3.3-21V, supported by the HONOR HN-200500CP0 charging adapter and the Huawei MateBook X Pro 140W Charger.

Notes:

Baseus 65W GaN5 Pro Charger (CCGAN65C5) supports 50W SCP (3.3-12V)