ORIGINAL: jasonsrc
im no rc expert, but i know my electronics. if you have 4x 11.1 volt 2200mah batteries, then wiring them 2 in series, 2 in parallel, then you have a 22.2 volt, 4400mah, effectively quadrupaling the wattage, by doubling the volts (2 in series) and doubling the amps (2 more in parallel). nice setup.
Actually, the wattage and amp draw are not determined by the battery capacity (assuming you have a battery large enough to handle the system current draw). Those numbers are determined by the motor and prop size.
Let's say I have an AXI 4120 motor with a 13x8 prop that draws 30 amps on a 5S pack - that would give me about 525 watts. Even if I had 100 5S batteries connected in parallel, my amp draw and watts would be exactly the same - I would just get longer run time.