I am using Samsung Galaxy S21. While charging my phone with a USB-C 65W Lenovo/Chicony power adapter with outputs supporting DC 5V/2.0A, 9V/2A, 15V/3A, and 20V/3.25A, how can I know exactly what power wattage is my device getting charged with? I tried using the Ampere app and the values range from 1000 mA to 2600 mA while the Voltage revolves around 4.1V?
Is there an app that can help provide power input details? Are there Android APIs to provide such information? Is it fine for me to keep using that charger? I understand Galaxy S21 supports USB C with power delivery, so it should be able to select the optimum voltage to charge my device?
From an article, I was expecting my charger to provide a 15W output but voltage x measured current using the Ampere app doesn't seem consistent with that number (5W?). What am I missing? How does USB Type C power delivery work in this case?