Making a 24 Volt Battery: 18650 Cells [7S 12P] First Attempt

I have been working hard to get the cells ready for this video. 5 months of effort went into selecting the exact batteries I wanted to use. Sadly, I totally brick the battery. Each of the cells live happily between 4.2V and 3.0V (ish) ... my fail at the end of the video drained the batteries to below 1V each cell. So, in short, all 84 battery cells are a total loss.
I do know what I did wrong. I put the balance wires for the BMS in the wrong order, and that confused the BMS. The BMS then started draining the batteries instead of balancing them.
HOWEVER! The battery construction was correct up to that point. And the battery was absolutely perfect for me up until I messed it up with that wiring.
Sigh... back to finding 84 more battery cells. Anyone who has laptop batteries they are getting rid of, I am happy to take them :)
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