But, if you preheat the oil, try to be able to get satisfyingly clean, dense clouds. These carts get the job done best with a force-button vape battery. Hold down the button to get a couple seconds in advance of using a draw. Some vape batteries just like the Rokin http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=150338&extra=