diff --git a/src/Entity/Warranty.php b/src/Entity/Warranty.php
index ca565aa4..6b759ac3 100644
--- a/src/Entity/Warranty.php
+++ b/src/Entity/Warranty.php
@@ -59,6 +59,13 @@ class Warranty
 	 */
     protected $bty_size;
 
+    // sap battery
+    /**
+     * @ORM\ManyToOne(targetEntity="SAPBattery", inversedBy="warranties")
+     * @ORM\JoinColumn(name="sap_bty_id", referencedColumnName="id", nullable=true)
+	 */
+    protected $sap_bty;
+
     // status
     /**
      * @ORM\Column(type="string", length=25)
@@ -202,6 +209,17 @@ class Warranty
         return $this->bty_size;
     }
 
+    public function setSAPBattery(SAPBattery $sap_bty)
+    {
+        $this->sap_bty = $sap_bty;
+        return $this;
+    }
+
+    public function getSAPBattery()
+    {
+        return $this->sap_bty;
+    }
+
     public function setStatus($status)
     {
         $this->status = $status;