Upgrading brushless system

Yup, checked out maxamps. Great site.

I run for hours on end the more mah, the merrier! Thats why I have have such a beefed up drive train for my new truck (UM trans in alloy case, titanium front center cvd, rc alloy rear center cvd, Sm f/r cvds, sm 8 spy diffs).

Okay, i found the general are of batteries i desire. I want the total # of cells (not just per side) to be 6s4p or the maxamps 4000 cells. Thats 22.2 volts total, and 16000 mah total, I can shell out for $400.

So i'll end up buying the 3s 4000mah pack, then ask for a custom 1s4p pack. I'll put the 3s on the motor side, and the 1s4p on the opposite side of the motor. What charger will I use to charge these two different packs?

Who else runs lipo?

So will a 12xl and 12020 work for this amount of batteries?

Thanks again guys