import Battery

Battery.mointor.onBatteryStateChanged = { (state) in
  print("State: " + state.stringValue)
}

Battery.mointor.onBatteryLevelChanged = { (level) in
  print("Level: " + (level.percentString() ?? "Unknown"))
}
Battery.mointor.start()

let level = Battery.mointor.batteryLevel
let state = Battery.mointor.batteryState

let levelString = Battery.mointor.batteryLevelString
let stateString = Battery.mointor.batteryStateString

Battery.monitor.stop()