So after following all the suggestions on here and from Maxx and Born regarding my one oddball shorty auto I got that draws real hard and won't stay lit, I threw it back on the charger and grabbed one of my other ones. Well after it was back to fully charged I tried it again. The first 2 or 3 puffs were perfect then it got real hard to draw again and the LED kept flickering. Almost as if that center post on the charger was pushing something inside the battery back into place. Any feasibility to this idea? Is this indicative a bad vacuum switch perhaps?