The 30W charging head needs to be paired with a data cable not less than 30W. And the rated working voltage of the charging head and the data line should be consistent.
The parameter in which W is power P means watt. According to physics common sense, we know that power is determined by current and voltage, that is, P=UI. The simple power is the same, and the current and voltage are not necessarily the same.
Therefore, we need to match the 30 watt charging head with a data line not less than 30 watts, and the working voltage of the two should be consistent.