Super Flat and compact SlimeVR Tracker

pls excuse/ignore the spelling and random capitalization, lol.

This is a Original Design...

Using:
- 18650 Cell
- 2 Pole JST connector (While plug for power)
- 4-5 cm wide Elastic Strap (i actually went to a tailor near me for a somewhat harder .. "bunchup resistant" strap and that was a good idea... dont make the mistake and think soft is good xD)
- ESP8266 D1
- Adafruit BNO085 breakout Board
- common Ebay battery contacts spring and flat...
- thin wire... i used enameled coil wire (because its easy to work with, lightweight/small and simple)
- a length of simple two stranded isolated wire for power.
- a 4mm printer nozzel
- some hotglue

Optional:
- reverse protection Diode... (i recommend ones with low forward Voltage although even ones with 0.8V Drop do work) (it is theoretical Optimal but i wouldnt run without.... BNO085's are expensive. And at some point, you will put the battery in the wrong way and be kinda sad... ask me how i know.)
- Resistor around 100