Learn how to use battery on your Samsung Galaxy S4 Active. See how much battery power is used for device activities.
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From a Home screen, tap Apps icon > Settings > More > Battery.
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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.
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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.