Slo-V Flyer

I would experiment a little more about rigging 2 separate capacity batteries with Nimh or something less volatile and not to mention expensive.

Your theories might make sense on paper but more likely than not, the 2200 mah 20C (~44 amps) will supply about the same current as the 4400 12C (~53 amps) for a total of 97 amps constant up to a point. BUT the 2200 will drain down before the 4400 does, though it is possible the 4400 will kick in and deliver increased amps to either "charge" the 2200 or bear the entire current draw and be over stressed either way, all the while the 2200 will be near depleted....

Bad idea.

I wish Access or RURC would chime in more about running two different capacity Lipos with more accurate info.