Device: Devolo - MT2649 / DRS21 (#3880)

Co-authored-by: rabattcoupon <110226954+rabattcoupon@users.noreply.github.com>

Author: github-actions[bot]

library/library.json

@@ -10674,6 +10674,12 @@
             "manufacturer": "ZVIDAR",
             "model": "Z-CM-V01",
             "battery_type": "Rechargeable"
+        },
+        {
+            "manufacturer": "Devolo",
+            "model": "MT2649 / DRS21",
+            "battery_type": "AA",
+            "battery_quantity": 2
         }
     ]
 }