[lincpimp]

If you have a balance adapter figured out that can balance the packs as a 4s, then charge the both fully seperately, then balance the after the charge. That way all 4 cells are closest to 4.2v and will take much lest time to balance. I would also suggest balancing the cells during the charge, even though theblinky is not the best balancer. A charge thru balancer like the fp vbalance or hyperion lba10 would be a better bet for a balancer that will protect the cells from overvoltage.