diff --git a/src/Controller/APIController.php b/src/Controller/APIController.php
index fec78d2d..3367a365 100644
--- a/src/Controller/APIController.php
+++ b/src/Controller/APIController.php
@@ -416,7 +416,7 @@ class APIController extends Controller
         // TODO: check current battery id
         // TODO: check condition (brand new / second-hand)
         // TODO: check is_motolite and is_active (1 or 0)
-        // TODO: check warranty expiration date (YYYY-MM-DD)
+        // TODO: check warranty expiration date (YYYYMMDD)
         // TODO: check model year coverage if it fits in between
 
         return $res;