Goal: Turn on Battery Saver and shorten screen timeout automatically.
Settings Guide:
Open Settings, Display, set Sleep / Screen Timeout to 30 seconds or 1 minute
Open Settings, Battery, Battery Saver, set schedule to “Turn on automatically” or “At a specific percentage” or choose “Always On” when idle
Turn off Background Activity for heavy apps in Settings, Apps
Optional automation with built-in Routines (Samsung example) step by step:
Open Settings, Advanced features, Bixby Routines
Tap + to create a routine
For IF choose “Screen Off” and add condition “Screen off for 5 minutes”
For THEN choose “Turn on Power saving” or “Turn off Wi-Fi or Bluetooth if unused”
Save routine
Estimated wattage reduction: About 2W are reduced in idle for phones with Battery Saver and reduced screen timeout