PHIX BY MLVTHE PHIX BASIC KIT BY MLV IS A TRUE CLOSED LOOP SYSTEM WITH A 320MAH INTERNAL BATTERY.THE PHIX HAS A 3.7V OUTPUT WATTAGE AND AT A FULL CHARGE HAS APPROXIMATELY 220 PUFFS PER CHARGE.PHIX Specifications:1.5ml true closed loop systemInternal 320mAh battery3.7V output wattage220 puffs per bat..