diff --git a/libnymea/interfaces/batterylevel.json b/libnymea/interfaces/batterylevel.json
index 5a90b91a..e9533acb 100644
--- a/libnymea/interfaces/batterylevel.json
+++ b/libnymea/interfaces/batterylevel.json
@@ -5,7 +5,8 @@
             "name": "batteryLevel",
             "type": "int",
             "minValue": 0,
-            "maxValue": 100
+            "maxValue": 100,
+            "unit": "Percentage"
         }
     ]
 }
diff --git a/plugins/mock/integrationpluginmock.json b/plugins/mock/integrationpluginmock.json
index 527672fb..360bd45e 100644
--- a/plugins/mock/integrationpluginmock.json
+++ b/plugins/mock/integrationpluginmock.json
@@ -111,6 +111,7 @@
                             "displayNameEvent": "Battery level",
                             "displayNameAction": "Set battery level",
                             "type": "int",
+                            "unit": "Percentage",
                             "minValue": 0,
                             "maxValue": 100,
                             "defaultValue": 0,