This SX350J Bootlegger Box Mod is a dual 18650 powered design that can be wired in either parallel or series configuration very easily. This is an entry level design intended for new builders with limited resources although a soldering iron, needle files and other basic hand tools will be needed.
(2) #4 x 5/8" counter sinking screws (top front hinge pins)
(4) #4 x 3/8" counter sinking screws (bottom hinge and top at back)
(4) Keystone 204 battery contacts, Mouser part number 534-204 or Ketstone 209 battery contacts, Mouser part number 534-209
(1) FDV 15mm 510 connector
(6) #0 or M1.6 screws (mount PCB)
(about 1 inch) shrink tubing for two wires, I used 16 gauge wire
(6 to 8 inches) 16 gauge wire
(about 2 inches) shrink tubing for three wires
(9 to 12 inches) 16 gauge wire.
Be sure to clean excess print material from all the recess and screw holes so parts will fit properly!