Does it have a fitting for the XPS 12?
Their claim is that they have a tip for every laptop in existence. I don't doubt it either. I sent them pictures of my Chromebook tip, with the dimensions, and they sent me the tip I needed for free. I would imagine, if they didn't have your exact tip, they would create one if you sent them the right dimensions. If you can afford it, buy this thing. I don't know how I managed without it. Just today I let my friend charge his electronic cigarette with it. As for me, I wouldn't be able to write this response right now without it. Best investment I've made in years. Great customer service as well.