A smartphone/tablet doing nothing special provides a baseline for subsequent tests in order to isolate the energy consumption of apps from that of the operating system (OS).
For example, a near five-hour test session on a Google Pixel 3a powered by Android 12 showed an average power of 0.527 watts csv file. A similar test session on a Fairphone3 powered by Android 13 showed an average power of 0.658 watts csv file.
Whether you are a student, engineer, or researcher, share your measurement data here.