1, from the data point of view, 5V4A is fast charging, but the specific still depends on the charging curve and the actual power during the charging process, According to the China Academy of Information and Communications Technology Tyre Terminal Laboratory and Huawei, Qualcomm and other standards drafting 1 unit, which took three years to jointly develop the \"fast charging technical requirements and test methods for mobile communication Terminals\
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2, ordinary charging mode refers to the rated output voltage of the adapter is 5V, rated output current is less than 3A charging mode;
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3, the agreement will also include Qualcomm QC, Huawei FCP fast charge, USB PD, MTK PE and OPPO's VOOC flash charge for fast charge five standards; The main types of fast charge include two types: high voltage fast charge and low voltage fast charge.
Under normal circumstances, the charging head of 2A supports fast charging.
The output current of most 18W fast charger is 2A. Meizu's 18W mCharge fast charger is Mediatek's PumpExpress fast charger, which uses 9V charging voltage and 2A charging current. The 18W charging power in the Qualcomm QC4 and USB PD fast charge protocols also uses the 9V\/2A charging output, that is, the 2A charging current. But now the fastest is the 6A charger, which is the fastest ever.
5 ampere
5 amps is a fast charge. If 5a is fast charging, because the normal mobile phone charging current is 2a, the efficiency of 5a should be improved a lot, so it can be regarded as fast charging.
1, from the data point of view, 5V4A is fast charging, but the specific still depends on the charging curve and the actual power during the charging process, according to China's information and communication research...