DIY box mod parts

[coblsobr]

I am in the process of generating a parts list for the DNA30 mod I'm going to build. I'm planning on running it with two 3100mah Panasonic 18659
0s. I have two questions. Is it possible to run it with three batteries? And does anyone know of a quality LEd stainless pushbutton that I can use as a fire button?

 

[coblsobr]

Correction. It should say 18650

 

[BigBeazy]

If it's your first build, stick with two. Might not even be enough room to hold three.