Hi
@heathrow
Not quite sure what you mean by the "eGo One 2200 mah tank" The eGo One is by itself a tank (with a 510 connection) that would work just fine on the Evic VT box (the mod powered by either internal or replaceable batteries). There are a few styles of the VT - A full-sized one has an internal battery, rated at 5000 mah. There are a couple of styles that take internal batteries, and there's the Evic Basic which has a 1500mah internal battery. All the devices have the 510 connection. All can handle a minimum of 40W which would be no problem for the eGo One tank.
Keep asking questions if you need to.