The Nu-Calgon 4175-11 Ecopure Refirgerant Charging System is a rechargeable system that helps to keep your vehicle's air conditioning system running smoothly. This system features a rechargeable battery and a charging station that can be plugged into an outlet. The system helps to keep your air conditioning system running smoothly by recharging the battery and keeping it topped off. The Nu-Calgon 4175-11 Ecopure Refirgerant Charging System is a rechargeable system that helps to keep your vehicle's air conditioning system running smoothly. This system features a rechargeable battery and a charging station that can be plugged into an outlet. The system helps to keep your air conditioning system running smoothly by recharging the battery and keeping it topped off.