User's Manual
BATTERY OPTIMIZATION
Having Battery optimization on for the applications, you can make sure they stay
inactive until you start using your device. On Battery Settings screen, tap More and
then select “Battery optimization”.
On dropdown list, select “All apps”, all the applications will be optimized by this function by
default. You can individually turn off the optimization mode of a certain app if you would like
it always activated by tapping on the app name and select “Don’t optimize” and then
“DONE”