Yes, the charging current of the mobile phone is controlled by the mobile phone, rather than the charging head, the charging head can only passively adapt to the needs of the mobile phone, so the ordinary mobile phone uses the fast charging device to charge, but only the current and voltage allowed by the ordinary mobile phone will be input, and the mobile phone that supports the low voltage fast charging device has a high threshold.
So most need to use the original accessories to achieve the ideal fast charge effect, the data line needs to support a maximum of 5A high current, there is almost no third party on the market, and VOOC also has a built-in identification IC, only the use of their own fast charge data line. Holding high-voltage fast charge mobile phones, basically can reach 2A current data lines can meet the needs of fast charge, but the charging head requirements are relatively high, such as Qualcomm requirements to support QC fast charge products need to pass certification, with relevant agreements, in the charging process will have a different process.
66W fast charge can normally charge ordinary mobile phones, and the voltage and current required for mobile phone charging is generally automatically controlled by the internal circuit of the mobile phone, that is, the mobile phone itself decides.
The basic original standard or regular brand of fast charger will have a built-in smart chip, its biggest role is to automatically identify the voltage and current required by the mobile phone, and then adjust it intelligtively to provide a suitable and safe current charge for the mobile phone.
When the fast charger recognizes that your phone does not support fast charging, it will automatically charge the phone according to the ordinary charging mode.
66w fast charge can not be charged ordinary mobile phones, first of all, its output power is too high, and the model does not match, but also can not reach the output power of 66w. And if the mobile phone does not support, the maximum output power of 66w is easy to shorten the battery life, and even cause the mobile phone explosion and other threats to personal safety.