A: The fast charging protocols include Qualcomm's QC3.0 (9V 2A) and QC4.0 (9V 3A), QC4.0 supports USB PD protocol, general USB PD (9V 2A/9V 3A), Huawei's FCP (9V 2A) ), MediaTek's PE (15W) and so on. Huawei's SCP has two specifications, 10V 4A and 5V 4.5A, OPPO's VOOC (5V 4A) and Super VOOC (10V 5A).
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