With my new crown, I'm finally able to vape at 30w. The coil is a .5 ohm. But, with the istick 30w and my chain vape, I get maybe 1 hour before my battery is dead. Then I have to spend 2.5 hours charging. I hope that when my Sig 150w TC comes I can get more than 1 hour of chain vape. I've tried to turn down the wattage, but the flavor really pop's at 30w.