SlimeVR 18650 Battery Holder with Electronics case for WEMOS D1 Mini and BMI160 or MPU6050

I remixed this from se7en9057's tracker case.
It's a solid case, but slightly over-engineered for it's intended purpose IMO.
His case had a radius on the bottom that made it difficult to print without supports. Even without supports it prints slow because of the overhangs.
Loaded it into Meshmixer and cut out the radius.
Case is still rigid enough to accept elastic straps without worry of breaking.

Print time on standard quality went from 2hrs 45 minutes to ~1hr 20minutes.
Went with 18650 batteries because of energy density compared to LiPo cells and price.
LiPo capacities were ~750-1500mAh. The current 18650's I have are 3400mAh's and were about 1/3rd of the price.