diff --git a/spec/Powertrain/Battery.vspec b/spec/Powertrain/Battery.vspec
index 1d1e8e27f..c4f49d938 100644
--- a/spec/Powertrain/Battery.vspec
+++ b/spec/Powertrain/Battery.vspec
@@ -8,9 +8,22 @@
 #
 
 #
-# Signals, attributes and actuators around the electric powertrain.
+# Signals and attributes related to the traction battery in vehicles with electrical powertrain.
+# For some vehicles the traction battery is referred to as the high voltage battery.
 #
 
+# It might be possible to disconnect the traction battery used by an electric powertrain.
+# This is achieved by connectors, typically one for plus and one for minus.
+PowerConnected:
+  datatype: boolean
+  type: sensor
+  description: Indicating if the power (positive terminator) of the traction battery is connected to the powertrain.
+
+GroundConnected:
+  datatype: boolean
+  type: sensor
+  description: Indicating if the ground (negative terminator) of the traction battery is connected to the powertrain.
+
 Temperature:
   datatype: float
   type: sensor
@@ -164,7 +177,6 @@ Charging.TimeToComplete:
   unit: s
   description: The time needed to complete the current charging process to the set charge limit. 0 if charging is complete, negative number if no charging process is active.
 
-
 Charging.Timer:
   type: branch
   description: Properties related to timing of battery charging sessions.