Most battery management systems incorporate some sort of cell balancing algorithm to make sure cells stay close to a common voltage. Usually this is some sort o

Most battery management systems incorporate some sort of cell balancing algorithm to make sure cells stay close to a common voltage. Usually this is some sort of resistor (per cell) that dissipates a small current from that cell and bleeds it off as heat. This is usually used while charging to get everything in line. That said, if a cell goes bad or has an extremely low capacity compared to the rest, there's not much you can do...