FlightPower V-Balance system

[neweuser]

First, you need to make sure your charger can do it. If you only have one output, make a series adaptor as you would for the controller. But I don't think your 636 can charge a 6s pack can it? I know the 977 can't do 6s. Also, once you have the charger that can handle the two, if you use in series, then charge in series.
when charging in series, it would like charging ONE pack.

[jhautz]

Is this the Schulze 636 we are talking about here?

If so, according to the data sheet I found, the first output can charge up to 11s lipo and the second output can do up to 3s lipo. If this is the correct charger it sounds like you can do this either way. Charge a 2 packs, one on each output, or charge in series as one pack on one output. It just depends on how you want to set it up.