18w fast charge to full charge time depends on the capacity of the mobile phone battery, generally in 1-2 hours.
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18W stands for power, power = current * voltage. Generally speaking, the higher the power, the faster the charging speed.
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Assuming that the mobile phone battery is charged with an 18W charger, the time required to fill 5000mA is generally 5000\/3600, about 1 hour
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18W is just the power of the charger, and another parameter is very important, that is, the charging current, is 2A or 3A, and now the fast charge, the charging current is increased to 3A, if it is 3A, full of a 5000 mah battery, the time is between 50-55 minutes.
18w fast charge to full charge time depends on the capacity of the mobile phone battery, generally in 1-2 hours.