How long it takes to charge a 30w mobile phone depends on the battery capacity. And it depends on the manufacturer. Most mobile phone batteries in 2021 will have a capacity of around 4,000 to 4,500 mah. 30w fast charging head, it takes about 45 minutes to fill. For the fast charging of mobile phones, the charging speed is very fast when the mobile phone power is low, the charging power can basically reach the nominal speed, and some manufacturers will greatly reduce the charging speed when the charging reaches about 80%, the purpose of doing so is to protect the battery life of the mobile phone.
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For some mobile phones that do not do well in heat dissipation, the heat generated when fast charging is relatively large, and when the temperature is high, the mobile phone will immediately significantly reduce the charging power for protection Settings
30W fast charge can be fully charged in about an hour