This is a simple case for the yellow chinese AVR/Arduino ESR Meter clones.

I've simply cut a M3 thread into three of the four spacers and glued a holder for two 18650 LiIon cells to the bottom.

Watch my print time-lapse on YouTube

Update 2016-06-17:

I've added an on-off switch and little helper discs in the corners to prevent warping.

Print Settings

Printer:

Fabrikator Mini

Rafts:

Supports:

No

Resolution:

Infill:

25%

Category: Electronics