diff --git a/src/Controller/CAPI/BatteryController.php b/src/Controller/CAPI/BatteryController.php
index 0cf12d8f..17e35857 100644
--- a/src/Controller/CAPI/BatteryController.php
+++ b/src/Controller/CAPI/BatteryController.php
@@ -49,6 +49,7 @@ class BatteryController extends APIController
                 'container_size_name' => $csize_name,
                 'date_update' => $batt->getDateUpdate()->format('YmdHis'),
                 'flag_new' => $batt->isNew(),
+                'flag_inventory' => $batt->isInventory();
             ];
         }