What does the wattage on a charging Cable /Power Adapter represent?

The "wattage" (W) on a charging Cable / Power Adapter indicates the maximum charging power that the cable and Power Adapter can support. The higher the wattage, the faster the charging speed.

Wattage determines charging speed: The higher the power, the more electrical energy is transferred per unit time, and therefore the faster the charging.For instance, a 20W charger can deliver more power per second than a 5W charger, provided the device can accept it.

Power output is the result of coordination among 3 parties: The actual power achieved during charging is the result of negotiation between the charger, the device, and the charging cable. Even if the charging cable supports high wattage, high-power fast charging cannot be achieved if the charger or the device itself does not support it.

Is the charging speed of a mobile phone related to the charging adapter or the charging cable?

Charging cable: Responsible for input current.

Charging adapter: Responsible for outputting voltage and current to charging devices (phones, tablets, earphones, etc.), providing stable power, and protecting electronic devices.

For fast charging to work：The charging adapter and charging cable must be used together for optimal results! If you only use a fast charging adapter with a regular charging cable, the charging speed will still be the same as regular charging.