Equivalent to the meaning of the model, the expression means that the fast charging treasure is 5v, 3a is 15w, 18w is 3.6a, so the 18w charge is faster. The only difference is that the charging current power is not the same, and the 18w fast charge is faster than the 10.5w fast charge.
< br >
The basic principle of charging is to power the battery, and the charging voltage should not exceed the battery operating voltage too much. It's easy to get power through charging. Either increase the voltage or increase the current. The high voltage fast charge represented by Qualcomm QC is mainly to improve the voltage when charging. The flash charge of OPPO is to increase the current from the beginning.
The difference in charging efficiency, the speed of the charge in the same time, 50W > 18W, 50W is more than 2 times of 18W, I hope it can help you
18 and 50 are power, 50w is definitely faster than 18 charging speed, but the volume is also relatively large.