Consider the case on the following screenshot attachment :
First, some definitions :
- Usage : Time that the phone was used (i.e. not asleep)
- Standby : Total time the phone was without charge, including time on deep sleep (i.e. when the screen is off).
- zIPS Percentage : Is the percentage of the total battery that was used by zIPS.
Using the data from the above screenshot as an example, here is how the battery consumption for zIPS can be calculated :
Device Battery Usage = 100-53=47%
zIPS Battery Usage = 0.21 x 47% = 9.87%
Battery Usage by zIPS per hour = 9.87 % / 16.25 hrs = 0.60% per hour