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.
Dyson Hoover batteries have 30A moli IHR18650C and Sony US18650VTC4, a lot of the time all that's ever wrong with them is the BMS board : r/diyelectronics
How to fix Dyson V6 battery with red-light flashing: DIY BMS PCB replacement
For dyson v6 bms pcb
1x Adapter Use For DeWalt 20v MAX XR Li-Ion Battery To Dyson V6 Vacuum w/BMS | eBay
Best V6 Pcb Bms Board For Dyson V6 Nesting Switch Charging Socket - Chargers - AliExpress