Samsung SM-G615F/DS User Manual page 132

Settings
Using the quick optimisation feature
On the Settings screen, tap Device maintenance
The quick optimisation feature improves device performance through the following actions.
Clearing some memory.
Deleting unnecessary files and closing apps running in the background.
Managing abnormal battery usage.
Scanning for malware.
Battery
Check the remaining battery power and time to use the device. For devices with low battery
levels, conserve battery power by activating power saving features.
On the Settings screen, tap Device maintenance
The usage time left shows the time remaining before the battery power runs
out. Usage time left may vary depending on your device settings and operating
conditions.
You cannot receive notifications from apps that use power saving mode.
Managing the battery
You can save battery power by preventing apps that are running in the background from
using battery power when they are not being used. Tick apps from the apps list and tap SAVE
POWER. Also, tap Advanced settings, and set the App power monitor options.
FIX NOW or OPTIMISE NOW.
Battery.
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