I made this mod with parts from 2.5" laptop hard drives.
I used Scubabatdan touch switch setup here.


I used a 3/4" rubber washer trimmed down a bit to fit into the tube.
I used JB weld to attach the end cap to the washer.

I drilled a hole in the washer big enough for the USB port.
I also drilled four vent holes in the washer to match the end cap.

I used JB weld to epoxy 33 platter spacers together to create the tube.
The end caps are the hard drive spindle caps.
The battery is an 18650 2200mAh from a laptop battery back and protected via a protection circuit like this one.
The green led is from an HP jetdirect network jack.

I used Scubabatdan touch switch setup here.


I used a 3/4" rubber washer trimmed down a bit to fit into the tube.
I used JB weld to attach the end cap to the washer.

I drilled a hole in the washer big enough for the USB port.
I also drilled four vent holes in the washer to match the end cap.

I used JB weld to epoxy 33 platter spacers together to create the tube.
The end caps are the hard drive spindle caps.
The battery is an 18650 2200mAh from a laptop battery back and protected via a protection circuit like this one.
The green led is from an HP jetdirect network jack.
