It is possible to charge the phone, but it is not recommended because the power is too small.
The battery of the Apple Watch is generally 3v, and the output voltage is about 3.3v, while the mobile phone battery is generally 3.6v to 4.2V. For example, the iPhone12 is 20W fast charge, and the 3.3v charger of the Apple Watch is difficult to fill the phone battery.
In addition, if the iPhone does not support wireless charging, there is no way to use the charger of the Apple Watch.
It can be universal, because the current is the same, the apple watch charger and the mobile phone use two ampere charging current, so it can be normal and universal, and the original charger should be used in daily life
Watch wireless charger can not charge mobile phone. Because for the watch wireless charger, the watch wireless charger is designed according to the watch low-power battery, and for the mobile phone, because the mobile phone battery power is large, the wireless charger must be used when charging the mobile phone, so the watch wireless charger can not be charged with the mobile phone
Watch wireless charger can not charge mobile phone. Because for the watch wireless charger, the watch wireless charger is designed according to the watch low-power battery, and for the mobile phone, because the mobile phone battery power is large, the wireless charger must be used when charging the mobile phone, so the watch wireless charger can not be charged with the mobile phone
The wireless charger of the watch cannot power the mobile phone, because it is not the same type of electronic product, the port and the volt are not the same.