[suicideneil]

You dont have to use 2 separate lvcs- a single 4s lvc, or a single 2s lvc would be fine. Wire the 2s lvc to the side of the hvmaxx that also powers the bec, and that 2s lipo will discharge a little faster than the other, and so the lvc will trip when it reaches 3.2v per cell, protecting both lipos from over discharge in effect. Or you can use the 4s lvc and wire it to the capacitor leads, so that it sees the full 4s voltage, and protects both lipos again- only problem with that is the lipo on the bec side will still drain a little quicker, so buy the time the lvc kicks in you can have one 2s lipo at 6v, and the other at 6.8 = 12.8v; lvc doesnt know this though, since it just wants to see a total voltage of 12.8v, individual cell voltage isnt seen....