Swapping driver in dx r2 drop-in

[underconstruction]

I am considering buying the dx r2 drop in. I would be using it with a 18650. It seems that the drop in is much brighter with higher voltage. Is it possible to swap the board out for one that would make for a brighter light with an 18650?

 

[LukeA]

Put in one of the AMC7135 boards from DX, they run on 3.7-4.5V. You'll probably want the 1050mA output one.