diff --git a/charger/delta.go b/charger/delta.go
index 42371ee6a..846cdc6fe 100644
--- a/charger/delta.go
+++ b/charger/delta.go
@@ -153,7 +153,7 @@ func (wb *Delta) Status() (api.ChargeStatus, error) {
 	switch s := encoding.Uint16(b); s {
 	case 0, 1, 2, 3:
 		return api.StatusA, nil
-	case 5, 6, 7:
+	case 5, 6, 7, 9:
 		return api.StatusB, nil
 	case 4:
 		return api.StatusC, nil