Is EVO a specific manufacturer brand, or is it universal? I am looking at buying a new set-up since I am using my wife's 2nd battery and tank from her Kanger e-smart starter pack. There is a small vape shop in my neighborhood that has a wide selection of equipment, and there are allot of batteries that have evo on them. I just want to make sure what I am getting is the real deal, and not a cheap knock-off.