That is the power supply I have, but doubled with the second one modded as per Tony's video,
You can charge 1 3s 2200 or 6s 5300 at 1c in about 50 mins, but it would be the same time to charge 4 3s or 4 6s at 1c,
I charge 4 3s at 2c and it takes about 20 mins, but be mindful of the charge rates for your batteries, mine are all capable of 5c charging,
I started with a small AC DC charger that was taking me over an hour per battery and was struggling at doing that, the Ichargers are wicked, I love the amount that can be done with my charger, the new duo series 308duo and 410duo are the dogs danglies I wish I could have stretched my budget to it, but my 3010b does everything and more than I need.