$ npm install react-native-disable-battery-optimizations-android --save

Manual linking not required for above versions

For manual linking : $ react-native link react-native-disable-battery-optimizations-android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.reactlibrary.RNDisableBatteryOptimizationsandroidPackage; to the imports at the top of the file
• Add new RNDisableBatteryOptimizationsPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-disable-battery-optimizations-android'
   project(':react-native-disable-battery-optimizations-android').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-disable-battery-optimizations-android/android')
   

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-disable-battery-optimizations-android')
   

import RNDisableBatteryOptimizationsAndroid from 'react-native-disable-battery-optimizations-android';

RNDisableBatteryOptimizationsAndroid.isBatteryOptimizationEnabled().then((isEnabled)=>{
	if(isEnabled){
		RNDisableBatteryOptimizationsAndroid.openBatteryModal();
	}
});

// for direct whitelisting app with Instant Dialogue 
//The user will be taken to a screen where they can indicate that they are willing to suspend portions of Doze mode effects on your app.
Note: Play store will not allow using this method, and will allow only as an exception


RNDisableBatteryOptimizationsAndroid.enableBackgroundServicesDialogue();

Also 
Add  this permission in your AndroidManifest.xml

<uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>