Have to say, I am really liking the RED Quad Charger. Recently took a road trip and was thinking of what all I had in the kit. For some odd reason I still have packed the travel charger that came with the two Redvolts. I'm guessing the quad charger is heavier than four travel chargers, but boy is it compact and much easier to use when needing to charge multiple batteries.
Also liking the Redvolt XL batteries because of their design compatibility with the smaller Redvolts. I've even wondered if RED ever considered a single module for an XL with the battery facing backwards and the Redmote on the dumb side. That would be a nice design and small too. And while I'm at it, put a power outlet on it and make it to mate with the camera without any module adapter.