>>105628797Android aggressively kills background apps to save battery, but you can prevent this for essential apps.
Key Methods to Prevent Background App Killing
Disable Battery Optimization: This is the most effective. Go to Settings > Apps, select the app, tap Battery, and choose "Unrestricted" or "Don't optimize." Some devices might have a centralized "Battery optimization" setting under "Special app access" where you can do this for all apps.
Turn off Adaptive Battery: This feature learns your usage and restricts less-used apps. Disable it in Settings > Battery > Adaptive Battery.
Check Background Usage Limits: On devices like Samsung, go to Settings > Battery and device care > Battery > Background usage limits. Ensure "Put unused apps to sleep" is off and consider adding apps to "Never sleeping apps."
Lock App in Recent Apps: Open your recent apps, long-press the app's icon, and select "Lock" or "Keep open." This is a temporary measure.
Developer Options (Advanced): In Settings > System > Developer options > Background process limit, you can adjust the limit, but generally, "Standard limit" is best, relying on individual app optimization settings.
Important Notes:
Manufacturers vary in their aggression (e.g., Samsung, Xiaomi can be more aggressive). Check "Don't Kill My App!" (dontkillmyapp.com) for device-specific tips.
Allowing too many apps unrestricted background access will drain your battery faster.
Android updates can sometimes reset these settings.