Vision Spinners buttons are getting stuck. After opening the battery and seeing the problem, I found that the glue (that holds the small circuit board) gets dislodged and button falls inside. This can happen easily from dropping the battery. The engineers at Vision need to use the method Joyetech uses to hold the button in place. Flimsy glue is a terrible idea and every battery is at risk from this defect. I urge madvapes to talk to Vision and sort this problem out.