I was typing on my touchscreen smartphone and for seemingly no explainable reason my messages kept sending without me pressing the send button. It was getting pretty frustrating until I realized my 510 was actually pressing the send button. So I started messing around with using the 510 as a stylus and it works. The LED tip doesn't work, because its not made of metal, so its not electrically charged, but the walls of the battery at the tip of my 510 do work. So when I've got gloves on outside in the cold weather, I can always use my e-cig as a stylus I guess. 