Получить статус питания

Code:

procedure TForm1.Button1Click(Sender: TObject);

var

  SysPowerStatus: TSystemPowerStatus;

begin

  GetSystemPowerStatus(SysPowerStatus);

  if Boolean(SysPowerStatus.ACLineStatus) then

  begin

    ShowMessage('System running on AC.');

  end

  else

  begin

    ShowMessage('System running on battery.');

    ShowMessage(Format('Battery power left: %d percent.', [SysPowerStatus.BatteryLifePercent]));

  end;

end;