When we tried to measure the power consumption on mobile device using Trepn, we found an interesting phenomena. We measured the power consumption for the same app at different battery level. The results showed that the power consumption tested at high battery level (for example 100%) is lower than the power consumption tested at low battery level (for example 60%). In the two test, we used the same app to do the completely same thing. But we got different power consumption at different battery level.
The following is the results tested on Hongmi2 device:
Low Battery Level Test:
Battery Remaining (%) 54.68888
Power [uW] 1778990
Duration : 23 min 26 sec
High Battery Level Test:
Battery Remaining [%] 96.47673156
Power [uW] 893661.1763
Duration : 24 min 40 sec
So, my question is : Is this power consumption normal? Is this phennomena the device's natural property?