Wireless Dactyl

Battery

JST connector lipo battery 3.7v

https://github.com/joric/nrfmicro/wiki/Batteries

https://www.amazon.com/2000mAh-Rechargable-Protection-Insulated-Development/dp/B08T6QS58J/ $23/4

https://www.aliexpress.us/item/3256804703864560.html

https://www.aliexpress.us/item/3256805102755487.html $10/4

32u4 Bluetooth LE

https://www.adafruit.com/product/2829