The charging speed of 20w fast charger is about 11% faster than that of 18w fast charger.
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The maximum output power of 18w fast charger is 18w, and the maximum output power of 20w fast charger is 20w. Charging a mobile phone that supports the fast charging protocol with the same battery capacity, the 20w fast charging speed is about 11% faster.
The 20w fast charge price is more expensive than the 18w fast charge price.
For example, the millet USB charger fast charge version (18w) is about 30% cheaper than the millet Type-C charger fast charge version (20w).
The first fast charging power is not the same, resulting in different charging time and efficiency, for the same mobile phone fast charging 20 watts charging time is certainly shorter than 18 watts charging, 20 watts fast charging efficiency is certainly higher than 18 watts fast charging.
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The second two kinds of fast charging caused by the heat of the mobile phone panel is not the same, fast charging 20 watts when the heat of the panel is definitely greater than the heat of the fast charging 18 watts charging panel.
Charging head Charging speed:
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The charging speed of 20W is faster than the charging speed of 18W, and the USB-C power adapter with 18W power needs at least 20W power to give full play to the fast filling force.
See if your fast charging technology is single-core fast charging or dual-core fast charging. A two-core is faster than a single core. Single cell protective battery. If the same fast charging technology 18w and 20w May be faster, the difference is not much in a few minutes