Just curious, but any reason why you wouldn’t opt for a multi-channel charger? It eliminates the hassle of ensuring all packs are at the same voltage (based on the advice given here), not to mention that you wouldn’t be stuck waiting for any given pack if they don’t all reach their peak around the same time.

I mean I guess it depends on how quickly you can recoup the ROI on such a purchase if you don’t already have the charger, but at least it might eliminate some clutter if you just had 2 4-channel chargers rated high enough that you can use all channels simultaneously at a decent clip?