How does this work? If I have the new kanger occ 15-60watt coils and an I stick 30 watt, can I run it at 30 watts and be okay? I don't understand about the higher coil wattage with the lower battery wattage. Like if I also have a cool fire iv rated at 40 watts with the 15-60 watt coil, will the coil last longer if I have it at like 30 watts? Because the coil isn't using so much wattage about half the wattage from what it can take. Does that make any sense?