With your LiPo packs, it would not be useful because they are already in series. I'm trying to think of what uses I could see for it, but the truth is - very few that I can think of, besides Doc's idea of charging up a big bank of cells for testing.
I do have a 12v 15A power supply, that I use in conjunction with a $5 DC-DC stepdown converter to offer me a range of voltages for various purposes from 10v to 2v. The downside is I don't think you could ever find something that remotely max out the capabilities that sweet little power supply of yours. That said, maybe at the very least you could use it as a power supply for a small DC-DC adjustable voltage step-up so you can have a range of voltages available (at a much smaller current than the max capability of your charger).
Edit: maybe the best option would be to see what that sells for on ebay. And buy something more applicable to your needs with the money. But I suppose I would wait to see if anyone else has ideas.