Anyone ever have problems when using loud amps with an ecig (not simultaneously, like with it in your pocket). I was standing next to a full bass stack and my guitarist was playing a half stack and we had drums, PA everything and after a two hour practice my batteries were acting up ( wouldn't activate, would activate after 4-5 seconds of dragging, had to blow on the end and quickly drag to get any vapor, etc) Anyone else had similar experiences? One of my batteries is KIA now, wanted to know if anyone else had a similar experience. I've found that having them on a charger renders them unaffected by the noise/vibrations.