no problem
The 50w charger also supports 20w output, and the phone will automatically select the charging power, which is determined by the electrical device, not the power supply device.
Wattage will not burst ah: support, will not burst.
A 65w50w charging head with the same voltage (V) value is better and more stable for charging a 20w30w mobile phone.
The 65w50w charging head means that the power of the charger is 65w50w, and the larger the power value, the better.
You can use a 50-watt charger to charge a 20-watt mobile phone, but he can't reach the charging level of 50 watts, and can only reach the charging level of 20 watts at most. The charging protection mechanism inside the mobile phone can only make it reach 20 watts, I hope to help you!