if you want to go more than 6s I would run dual packs than and buy the 0610 duo, which has 2 sets of output jack and balancers. The 1210 charger based on the 180 watt number and allowing 20% for effiencicy you still could only charge a 6s @ 6 amps and this is the max you could do and as you go up in cells it will get worse, when I was looking for a charger the max wattage the 1210 could do scared me away from it more than not having a balancer