diff --git a/src/lib/battery/module.yaml b/src/lib/battery/module.yaml
index 4cbf1da675..c7750801b6 100644
--- a/src/lib/battery/module.yaml
+++ b/src/lib/battery/module.yaml
@@ -86,6 +86,7 @@ parameters:
 
             type: enum
             values:
+                0: Unknown
                 1: 1S Battery
                 2: 2S Battery
                 3: 3S Battery