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
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.
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