diff --git a/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs b/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
index c87a31b2b5fc087e38128d9d4198fdd0bc44a2ca..90e645edb59ed207277b1d3ac7090fa583235557 100644
--- a/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
+++ b/VectoCommon/VectoCommon/InputData/DeclarationInputData.cs
@@ -908,6 +908,14 @@ namespace TUGraz.VectoCommon.InputData
 		TableData MaxCurrentMap { get; }
 	}
 
+	public static class BatteryHelper
+	{
+		public static AmpereSecond TotalUsableCapacityInSimulation(this IBatteryPackDeclarationInputData batteryData)
+		{
+			return batteryData.Capacity;
+		}
+	}
+
 	public interface ISuperCapDeclarationInputData : IREESSPackInputData
 	{
 		Farad Capacity { get; }