Baked beans with hamburger

Ingredients: 
1 pound hamburger
1 pound bacon, cooked and crumbled 
2 large cans pork and beans
1 can kidney beans, drained 
1 can butter lima beans, drained
1 cup onion, chopped
1 cup ketchup
3 teaspoons white vinegar
1 teaspoon liquid smoke
1/4 cup brown sugar
1 teaspoon salt
1 teaspoon pepper

Preparation:
Put in a slow cooker, cover, and cook on low heat for at least 4 hours or 2 hours on high.