Since Android 14 (SDK 34) applies strict battery optimization policies, background services frequently get killed. Devices like the DEERTiME E9 tablet aggressively clean up background apps to free up memory.
Please try adjusting the following settings one by one.
1. Disable Battery Optimization (Most Important)
Prevent the system from forcing your app to close by removing it from the battery optimization list.
1. Open the Einstellungen (Settings) app.
2. Go to Apps or Apps & Benachrichtigungen (Apps & notifications).
3. Select the app that is getting killed.
4. Tap Akku (Battery).
5. Change the setting to Nicht optimiert (Not optimized) or Unbeschränkt (Unrestricted).
(If it is set to Optimiert or Beschränkt, the system will kill the app automatically.)
2. Allow Background Activity & Autostart
Some devices have specific toggle switches inside the app information page for background permissions.
1. On the same app info page, look for Hintergrundaktivität (Background activity) and set it to Zulassen (Allow).
2. If you see Automatischer Start (Autostart), toggle it ON.
3. Lock the App in Recent Apps View
Similar to Xiaomi phones, you can lock the app so it is not closed when you clear all recent apps.
1. Open the Recent Apps screen by tapping the square button (■) or swiping up and holding.
2. Long-press the app icon or tap the three-dot menu at the top right of the app card.
3. Select Sperren (Lock) or the padlock icon.
4. Check System-Wide Sleep Modes
Some budget tablets have an aggressive "Intelligent Power Saving" mode that cuts off background activities when the screen is off.
1. Go to Einstellungen (Settings) > Akku (Battery).
2. Make sure Energiesparmodus (Battery Saver) is turned OFF.
3. Use the search bar inside Settings to search for "DuraSpeed" or "Standby". If found, turn it off or add your app to the whitelist.
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