CipherLab RS35 Reference Manual page 52

RS35 Mobile Computer
Icon
Note: This mode will automatically become inactive when your device is being charged.
BATTERY OPTIMIZATION
With
Battery optimization enabled
inactive when your device is idle or when they have not been used for days.
1) On screen, tap on
Battery
Battery saver mode is OFF.
Battery saver mode is ON.
for the applications, you can make sure they stay
and select "
More
Description
Battery usage
50
".