The difference between 66w and 5A:
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1, the charging speed of the two is different, as well as the internal materials of the two are different, the resistance of 5a is larger than 6ww, so the current passed per unit time is small, under the same voltage, 66w is faster than the charging speed of 5a.
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2, suitable for different scenarios: 5a fast charge can charge mobile phones that support 5a or below, can not charge mobile phones that support more than 5a, and 66w fast charge can charge mobile phones that are below 66w, and can not charge more than 66w.