The Big Brother box mod uses two 14500 batteries and the Voltage can be adjusted between 0 and 6.5V. Comes with 510 threading. On the website, theres is no instructions on how to adjust the voltage but i guess you use a small screwdriver to do it.

Made in	USA
Manufacturer	Ken’s Box Mods
Dimensions	N/A (Tell us)
Weight	N/A (Tell us)
Material	N/A (Tell us)
Solderless/wireless	No
Button placement	N/A (Tell us)
Supplier(s)	Boxmods.net
Video(s)	N/A (Tell us)

Read more about this mod >>

Voltage can be adjusted (0-7V) easily with a thumb wheel. Additional colors available, black is $3 extra..

Made in	USA
Manufacturer	Boxmods.net
Dimensions	N/A (Tell us)
Weight	N/A (Tell us)
Material	N/A (Tell us)
Solderless/wireless	N/A (Tell us)
Button placement	Top
Supplier(s)	Boxmods.net
Video(s)	N/A (Tell us)

Read more about this mod >>