use multiple button to pass information in one scene in javaFX

Question

I have a Controller class called: BatteryBoardSelectionFrame and I have a Controller for a javaFX scene called: CellDetailShowScene

I have 2 buttons named: redBatteryBtn and redBatteryBtn2 in "BatteryBoardSelectionFrame" class that should pass information from this class to "CellDetailShowScene" class.

I can pass redBatteryBtn information to "CellDetailShowScene" and print the informations perfect, but I don't know how to pass redBatteryBtn2 information to "CellDetailShowScene"

Every time I run the program, and click on second battery(redBatteryBtn2) it shows just first battery information(redBatteryBtn).

can you please help me with this?

The code for BatteryBoardSelectionFrame class is:

   public class BatteryBoardSelectionFrame implements Initializable {

    @FXML
    private Button redBatteryBtn, redBatteryBtn2;

public int batteryLevel = 3;
public int batteryLevel2 = 10;

@FXML
    public void openCellDetailShowScene(ActionEvent event) {
        FXMLLoader loader = new FXMLLoader(getClass().getResource("View/CellDetailShowScene.fxml"));
        if (event.getSource().equals(batteryLevel)) {
            System.out.println("0");
            try {
                Parent root = (Parent) loader.load();
                CellDetailShowScene cellDetailShowScene = loader.getController();
                cellDetailShowScene.getCell1Data(batteryLevel);

                Stage stage = new Stage();
                stage.setScene(new Scene(root));
                stage.show();
            } catch (Exception e) {

            }
        }
        else if(event.getSource().equals(batteryLevel2)){
            System.out.println("1");
            try {
                Parent root = (Parent) loader.load();
                CellDetailShowScene cellDetailShowScene = loader.getController();
                cellDetailShowScene.getCell1Data2(batteryLevel2);

                Stage stage = new Stage();
                stage.setScene(new Scene(root));
                stage.show();
            } catch (Exception e) {

            }
    }
}

 public int getBatteryLevel() {
        return this.batteryLevel;
    }

public int getBatteryLevel2() {
        return this.batteryLevel;
    }
}

and The code for CellDetailShowScene class is:

    public class CellDetailShowScene implements Initializable {
    
        @FXML
        private Label chargeLevel;
    
    BatteryBoardSelectionFrame batteryBoardSelectionFrame = new BatteryBoardSelectionFrame();
    
    public void getCell1Data(int batteryLevel) {
        }
    
    public void getCell1Data2(int batteryLevel2) {
        }

@Override
    public void initialize(URL location, ResourceBundle resources) {
        LoginFrame loginFrame= new LoginFrame();
        welcomeUsername.setText("welcome " + loginFrame.getUsernameField());

        int showChargeLevel1= batteryBoardSelectionFrame.getBatteryLevel2();
        int showChargeLevel2= batteryBoardSelectionFrame.getBatteryLevel2();

        chargeLevel.setText(String.valueOf(showChargeLevel1 + "%"));
chargeLevel.setText(String.valueOf(showChargeLevel2 + "%"));
chargeLevel.setText(String.valueOf(Integer.parseInt(String.valueOf(chargeL))));

 public void getCell1Data(int chargeL, int temperatureL, int voltageL, int currentL){
        int showChargeLevel= batteryBoardSelectionFrame.getBatteryLevel();
}

}

Thank you guys