To use a smoker box in a charcoal grill you should follow a few steps with precaution so that it does not hurt you by any chance. Preheat the grill till it reaches the maximum temperature then put the smoker box filled with wood chips. Don’t overload it. Keep it as close as possible to the charcoal fire after closing the lid. Use tongs to shift the position of the smoker box. When the intensity of smoke increases, lower the temperature of the burner. Let the food get cooked. Wait for some time then you can serve the dish.