A relatively common problem with the MVP is it's center pin which connects to the battery, and makes the connection to the
juice delivery attachment's connector. It can easily be pushed down too far to make an electrical connection. Either that, or the center pin in the Evod's connector is too short to make an electrical connection. This is usually caused by over-tightening a
juice attachment onto a battery device.
The following video shows how to pull or tease up the center pin on a battery device. The same procedure can be done on a juice attachment if its center pin is too short.