That makes no sense at all. I built a pr of 5S and 6S a123s with harvested a123 cells from Dewalt 36v packs and used hyperion balance taps. The 6S takes 7 wires and the 5S takes 6 wires to connect the balance taps. My hperion 0610i balancing charger sees the cells correctly and they balance properly.

I have no idea what they are doing with a single wire. Balance tap wiring is very plainly shown here in the LBA10 balancer manual - see top of page 4 for a123s.

http://www.allerc.com/Pictures/LBA10...Manual-ENG.pdf

Do these pacs have to use their charger and they are balancing some way using main power leads and this single wire?? That doesn't seem possible either.