diff --git a/csharp/Lib/Devices/Battery48TL/Battery48TlRecord.Api.cs b/csharp/Lib/Devices/Battery48TL/Battery48TlRecord.Api.cs
index 142f1de2a..e1bbe7d92 100644
--- a/csharp/Lib/Devices/Battery48TL/Battery48TlRecord.Api.cs
+++ b/csharp/Lib/Devices/Battery48TL/Battery48TlRecord.Api.cs
@@ -20,8 +20,12 @@ public partial class Battery48TlRecord
     public Boolean ConnectedToDcBus => (_IoStates & 1) == 0;
     public Boolean Eoc              => Leds is { Green: On, Amber: Off, Blue : Off };
 
-    public Strings Warnings => ParseWarnings().OrderBy(w => w).ToList();
-    public Strings Alarms   => ParseAlarms()  .OrderBy(w => w).ToList();
+    
+    public String SerialNumber => $"{_SerialNum1:D4}{_SerialNum2:D4}{_SerialNum3:D4}{_SerialNum4:D4}".TrimStart('0');
+
+    public String  FwVersion    => _FwVersion.ToString("X4"); 
+    public Strings Warnings     => ParseWarnings().OrderBy(w => w).ToList();
+    public Strings Alarms       => ParseAlarms()  .OrderBy(w => w).ToList();
 
     public Percent Soc => _Soc;
     
@@ -45,7 +49,19 @@ public partial class Battery48TlRecord
         internal Leds_(Battery48TlRecord self) => this.Self = self;
         
     }
-
+ 
+    public readonly struct _StringActive
+    {
+        public Boolean String1Active     => (Self._LimpBitMap & 1)  == 0;
+        public Boolean String2Active     => (Self._LimpBitMap & 2)  == 0;
+        public Boolean String3Active     => (Self._LimpBitMap & 4)  == 0;
+        public Boolean String4Active     => (Self._LimpBitMap & 8)  == 0;
+        public Boolean String5Active     => (Self._LimpBitMap & 16) == 0;
+        
+        internal _StringActive(Battery48TlRecord self) => Self = self;
+        private Battery48TlRecord Self { get; }
+    }
+    
     public readonly struct Temperatures_
     {
         public Boolean     Heating => (Self._IoStates & 64) != 0;