Fig 4 - available via license: Creative Commons Attribution 4.0 International
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Current over time under variable screen brightness (B) from 0 to 250, Android's max value. Software versus hardware measurements (LMX210).
Source publication
Advances in cloud computing have simplified the way that both software development and testing are performed. This is not true for battery testing for which state of the art test-beds simply consist of one phone attached to a power meter. These test-beds have limited resources, access, and are overall hard to maintain; for these reasons, they often...
Context in source publication
Context 1
... find that pure software measurements are enough to identify trends in measured current, but have limited overall accuracy and granularity, e.g., a 30 seconds reporting frequency across all our Android devices. As an example, Fig- ure 4 shows the time evolution of the current measured via BatteryLab (hard- ware) and software while increasing the screen brightness from minimum (0) to maximum (250) by 50 units over 60 seconds, as indicated by the vertical dashed lines. This plot shows that pure software measurements are enough to identify trends, but have limited overall accuracy and granularity -while the plot refers to the LMX210, we measured a similar reporting frequency (30 seconds) across all Android devices. ...
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