As an iPhone X user, I'm sad to tell you that the iPhone X doesn't support a 120-watt fast charge. According to the official information, the charger equipped with the iPhone X has a maximum output power of 29 watts, and only supports Apple's own fast charge technology. So, if you use a 120-watt fast charger to charge the iPhone X, you can only charge it at 29 watts, which is equivalent to wasting the fast charge function.
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However, the iPhone X also has some other charging tricks, such as using wireless charging, using a USB-C charger, and so on, which can also improve charging speed. Overall, even though the iPhone X doesn't support a 120-watt fast charge, it's still an impeccable smartphone.
1. 120W fast charge is not supported. 2. Because the maximum charging power of the iPhone X is only 29 watts, it cannot support the fast charge of 120 watts. 3. If you need a quick charge, you can use Apple's official recommended 30 watt or 61 watt USB-C charger, which can be fully charged in a short time and will not cause too much impact on battery life.
It can be used, but if you use A 120W A-port charger, the charging speed is not as fast as the 20W C-port charger. If you use the above two chargers to charge the Apple x, the maximum power is only 12W, because the PD fast charge of the Apple x requires a C-port charger.
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If you use a 120W C-port charger, the charging speed of the off-screen state is exactly the same as that of the 20W C-port charger, and the bright screen charging (while charging), if you ensure that the body is not hot, it may be slightly faster than the 20W C-port charger