Hold down button for 2.0 seconds to prime it, then inhale at will. After releasing button, continue to inhale for another 1.5 seconds. I have 8 of the 13 sec cutoff xl mans (in addition to various rarely used shorties and regs), never a problem, all working all of 2010. XL mans hands down best
vape in town; it just doesn't get any better than this.
edit: To further clarify, the last 6 xl mans have been of the new style, better draw, outstanding charge capacity. Having said that, my older batts also work well, just have a tighter draw.