Learn how to use battery on your Samsung Galaxy S4 Active. See how much battery power is used for device activities.
From a Home screen, tap Apps icon > Settings > More > Battery.
The Power Saver level displays in percentage. The amount of time the battery was used also displays. Power saver usage displays in percentages per application.
Tap Screen, Android System, Android OS, Cell standby, Media server, Device idle, or any other listed application to view how it is affecting power saver use.
Note: Other applications may be running that affect battery use.