Dyson Dyson SV21 Power Pack Battery 2500mah 65wh Genuine Part. Part No: 965363-01 - 965363-01
An (Unofficial) Firmware Upgrade for Dyson V6/V7 Vacuum Battery Management System « Adafruit Industries – Makers, hackers, artists, designers and engineers!
How to Repair Dyson Battery Pack - Salvage 18650 Cells - YouTube
Replacing 18650 battery cells in a Dyson V6 cordless vacuum battery - YouTube
120w powerbank made from a Dyson vacuum battery pack. Dyson do not balance cells and their bms bricks pack when they get out of balance. Replace bms, remove two sony vct4 cells.