I'm making a small rotary tool that can fit in a pocket. This is what I have so far. I just need a battery, charging method, and I'll 3D print the enclosure.

21st Century - Department of Mechanical Engineering

Have a question about Dremel 8260 12VLi-Ion Variable Speed

Make Something Wonderful

Lockdown Lockdown Locomotive Locomotive: 3D Printing Technology To

Digital Fabrication for Designers

1kW Arduino MPPT Solar Charge Controller (ESP32 + WiFi) : 46 Steps

Yoose Alloy Mini Rechargeable Rotary Shaver review - Yoose guys

STLINK-V3PWR two-in-one debugger probe Botland - Robotic Shop

Make a Cordless 12V Rotary tool under $20 - DIY Tutorial

Full Credited Responses: The Next 50 Years of Digital Life

Make 3d printing by wattronix - Issuu

Enhanced DeWalt Drill Before and After : 23 Steps (with Pictures

Useful 3D prints for SDIY and electronics - DIY STUFF - Look Mum

How to learn how to build my own electronics circuit with a board