Unanswered - Shimano Battery pinouts?

Disassembling Di2 battery : r/bikewrench

Manuale Lightest en REV10, PDF, Battery Charger

YA165A Snap-On Battery Charger Parts List

Has anyone heard of or tried Toseven mid drive?

PDF) A 2-Degree-of-Freedom Quasi-Passive Prosthetic Wrist With Two Levels of Compliance

Shimano 36v Li ion workaround repair pt1

Broken port on Shimano BT-E8010 battery

Shimano Ultegra and Dura-Ace Di2 Electronic Shifting – Everything You Need to Know – Carlton Bale

Unanswered - Shimano EP8 motor stuffed at 1010kms - what brand of motor should I replace it with?