Preheat the smoker to 250 degrees Fahrenheit.

In a small bowl, combine salt, black pepper, brown sugar, onion powder, and garlic powder.

Cut the pork belly into 1 ½ inch cubes.

Toss the pork belly cubes with the dry rub mixture.

Place two large-rimmed baking sheets with baking racks on top.

Spread the seasoned pork belly cubes evenly over the baking racks.

Place the baking sheets in the smoker, close the lid, and smoke for 2 ½ hours.

Meanwhile, preheat the oven to 350 degrees F.

In a 9 by 13-inch baking dish, mix barbecue sauce and apple cider.

Once the pork belly is done smoking, transfer the cubes to the baking dish with the barbecue sauce mixture.

Toss the pork belly cubes to coat them evenly in the barbecue sauce.

Cover the baking dish tightly with foil.

Bake in the preheated oven for one hour.