Need some help here! I have 2 of the same battery; same kit; same everything. Got some new cartomizers today; work awesome on the one battery; on my other one well; i get this airy draw and hear a whistling sound; end lights up; but no vapor or anything. the part where the tape starts/ends on the cartomizer is at a different place which i found weird; why isnt it producing? I have gone as tight as i possibly can; is there a fix. i can actual feel the air coming out where the battery screws onto the cartomizer. my other carts work fine on both batteries. 
