An option that I have available to me is charging on a Hitec x4 pro ac+ 400watt with a DC Source of at at least 14vdc 30amps higher voltage within spec is better. Can allocate wattage but only down to two channels, figures so it can only charge at 200watt?? One battery .. so that can charge all my lipos primarily and finish off the High voltage lipos on a separate Dynamite passport P2 which can run upto 200 watts on a dc power supply but still only 100 per channel no combining.

So in my case I can charge faster with the X4 and then finish off in the passport (same as hitec) if HV lipo.