Madvapes is running a great deal on a VV Box Mod. This is a great way to get an introduction to variable voltage or for an extra PV. These are great for portability. I just bought one, why not? 7 volts for 23.00?
HARD COPY:
Variable Voltage White Box Mod
These 3xAA box mods incorporate our new variable voltage circuit board. They are adjustable in voltage from 0 to approximately 7 volts. The NCP 630 regulator does a great job with minimizing voltage drop when an atty is being used. The sealed 510 connector and sealed tactile switch will help prevent failures. Placement of the potentiometer allows easy adjustment with a screwdriver or finger nail. Requires two 14500 batteries(sold separately) Due to these being custom made, there may be slight variations or small spaces where the potentiometer exits the box. There is a 30 day warranty on these boxes.
WHERE: http://www.madvapes.com