import BatteryMonitor from 'react-native-battery-monitor';
 
const ubsubscribe = BatteryMonitor.onStateChange((status) => {
  console.log(status.state); //  "unknown" | "unplugged" | "charging" | "full"
  console.log(status.level); // 0.80000001192092
});
 
const batteryState = await BatteryMonitor.getBatteryState();
 
// unsubscribe
ubsubscribe();