Place the smokies, jelly, and BBQ sauce in a slow cooker.
Stir to coat all of the ingredients.
Cover and cook on LOW for 2-3 hours or until the sausages are heated through.
Stir again before serving.
Notes
Feel free to experiment with different types of sausages. While Lil' Smokies are traditional, you can use cocktail sausages, kielbasa, or any other sausage variety you like.
The cooking time may vary depending on your slow cooker's size and heating efficiency. Be sure to monitor the smokies as they cook to avoid overcooking, especially if you have a smaller slow cooker.
If you have leftovers, store them properly in an airtight container in the refrigerator for a few days or in the freezer for longer storage.