LBA10 balancer defect?

[BrianG]

I've found the LBA to be very sensitive to ANY imbalance. Try measuring down to the 10ths of a volt. If one LED is not lit, that is the low cell and the lit ones are the ones actually balancing (bringing down the low cells).

And a balancer works by discharging the high cell(s) to the level of the lowest cell. The discharge rate is usually pretty low (100-300mA), so if there is a bad imbalance, bring the charge rate down to 100mA. Otherwise, the high cells could hit above the 4.2v/cell mark before the low cell has a chance to catch up.