It really is simple. Buy the Battery enclosure (4 AA), pushbutton switch, 6 volt light (3 in a pack) and size M coaxial DC plug (male and female). Take the box apart and rearrange it so 3 batteries fit as in my picture. The hardest part was CAREFULLY using a dremel to cut a 510 connector off a battery, I stress carefully so you do not hit the battery (or go the easy route and order one online). The positive from the battery goes to the switch. The second side of the switch goes to the light and the center of the 510 connector. The ground ties into the other wire of the light and the outer part of the 510. The DC plug is optional, hook it to the positive battery and the ground. The way I did it you CANNOT use the 5 volt while the batteries are in or you will damage the batteries.