See, the iPhoneX fast charge uses the USB PD charging protocol, and Apple is one of the members of the charging protocol alliance. At this stage, Apple's official chargers that can be used by the iPhoneX to support fast charging have five USB-C interfaces: Apple 18W, 29W, 30W, 61W and 87W. Everyone will be curious to see here, Apple mobile phone only supports the maximum 18W charging power, then those charging head after 29W to charge iPhoneX will not burn the phone?
You don't have to worry, the USB PD protocol is that the charging head and the mobile phone (charged device) can shake hands, that is, when you connect an Apple original 87W (Apple Macbook Pro's original USB-C charger) to the iPhoneX for charging, the charging head will first communicate with the phone. The iPhoneX will then tell it that I am only a phone, and the maximum current is only 18W, so even if you use an 87W charger, it will never charge the iPhoneX more than 18W.
iPhone X is the first LED screen phone with full screen launched by Apple in 2017, it is the first time to support fast charging mobile phone, it is fast charging, Apple fast charging is 18 watts, that is, 9 volts 2 amps of power current, about two amps, the power of this fast charging and the current Android is very far away. But it's also an innovation for Apple.
Support is 18W fast charge, according to the official introduction of 30 minutes can be charged up to 50% power, need to use 18W or more power adapter (need to buy separately).
The iphonex does not have to be charged for 12 hours for the first time, it can be fully charged, but remember that the first time it is best to charge when the screen prompts 10%, do not run out of power;
It can be charged at any power level, and it is not necessary to wait until the power indicator is too low