I'm not sure. I'm trying to research the subject now but there is a daunting amount of information to sift through to figure it out.

This charger will sit next to my PC and I will only rarely be waiting on it to charge. Most of the time I'll likely start charging batteries one at a time after a day out bashing or goofing off at the tracks in the area. That being said, I don't want to be stuck waiting days for 4 4s packs to discharge, balance, and charge. I can be a little flexible on price if it's going to put me past a feature break point.