SlimeVR Trackers based on LilyGO T-OI Board. Hotswappable batteries and the easiest way to make DIY trackers since you only need to solder 1 component. Enjoy. For instructions on how to make: https://github.com/RDTiel/Tiel-Lilygo-SlimeVR-Tracker For questions dm me on discord @rd_tiel
Download from thingiverse