I have finished the design of the 3d printed part to hold the battery, Spark 2, and recharge port. This part will connect to the first post about the Obi Wan lightsaber which will hold the crystal chamber. I'm looking forward to seeing it printed out.
The green battery is an 18650 and the red card is the Spark 2 which controls all the LED's for the blade and accents for the chamber, and the sound when you move the saber.
The hole in the above picture is for the 2.1mm recharge port.
This part will connect to the above to make the crystal chamber and hold the speaker.