diff --git a/src/Controller/VehicleController.php b/src/Controller/VehicleController.php
index f7f8c625..d09d3752 100644
--- a/src/Controller/VehicleController.php
+++ b/src/Controller/VehicleController.php
@@ -310,6 +310,41 @@ class VehicleController extends Controller
                     }
                 }
             }
+            // need to check if a battery has been added
+            if (count($current_batteries) < count($batteries))
+            {
+                // get the ids of current batteries
+                $cbatt_ids = [];
+                foreach ($current_batteries as $cbatt)
+                {
+                    $cbatt_ids = [
+                        $cbatt->getID(),
+                    ];
+                }
+
+                // find the battery to add
+                foreach ($batteries as $batt)
+                {
+                    $batt_id = $batt;
+                    if (in_array($batt_id, $cbatt_ids))
+                    {
+                        // do nothing since battery already there
+                        continue;
+                    }
+                    else
+                    {
+                        // batt is the new battery
+                        $battery = $em->getRepository(Battery::class)->find($batt_id);
+
+                        if (!empty($battery))
+                        {
+                            $battery->addVehicle($row);
+
+                            $em->persist($battery);
+                        }
+                    }
+                }
+            }
         }
         else
         {