I can't find an answer to my question. I'd like to know if the smok vmax takes button top or flat top batteries. The ones that came with it look flat. Not like a button on a regular size D, or C cell battery. They have a small indent on the top, but nothing protruding out like a button. I'm trying to include a pic of them so PLEASE HELP. I ordered a set of flat top for my vmax. I'm still a noob so excuse my ignorance please. I'm just trying to find out the truth. I've heard different types from different people. I'm wanting to get it right, so I don't waste anymore money.