This Instructable is for a high power flashlight that uses a CREE XM-L LED and is powered by 3 D-cell batteries. Most of the parts are fabricated using a 3D printer and due to the size/shape, it is broken down into several segments. The wiring for this flashlight is very simple. It composes of the 3 batteries in series, connected straight to the LED via a rocker switch. There are no resistors in series due to the fact that there is enough resistance from the batteries (alkaline), wires, and switch.. and because the CREE XM-Ls are beastly LEDs. Granted, this is a very inefficient way to power these LEDs for various reasons, but it does work and is really bright... battery life might just be a bit lacking... and the light output may be a bit inconsistent from beginning to end of battery life. The middle segment of the body is sized to be the length of a D-cell battery so one can add extra segments to make it a 4+ battery light. This will of course require different wiring/electronics... not covered in this Instructable.
Step 1: Tools, Materials & Parts