The 7.4V battery controller IC's that have specs on the web now seem to have a balancing function built into them now so perhaps newer packs will have balancing circuitry. I can't tell if my gen1 MagicShine pack has balancing as I can't find the exact spec sheet for the IC anymore (thought I found it once...). There is a wire to the center tap of the battery pairs but if the pinout on this IC is the same as the ones I can find on the web now the balancing function is disabled since the 2 pins that would be doing the balancing are tied together. In any case, my pack is quite out of balance so if there was balancing circuitry in place it didn't work well.