I mainly use my MVP 2, but I also picked up three Vision Spinner 1300mah batteries from VividSmoke. After only a short time using them, two of the three aren't working. Fully charged, I've swapped everything around to rule out a clearomizer problem, everything looks clean and fine, the LED comes on like normal, but no joy. I'm guessing that it's something simple and silly that I just haven't thought of.