[RC-Monster Mike]

Just a little more info on "c" ratings:
"c" rating describes the batteries discharge ability in relation to its "capacity". c = Capacity.
a 30c 1500mah battery can only deliver half the power of a 30c 3000mah battery.
1500mah = 1.5ah. So 30c x 1.5 = 45amp discharge ability
3000mah = 3ah. so 30c x 3 = 90amp discharge ability

The given battery's "c"rating never changes, but the discharge ability double when wiring in parallel. So:
2 x 1500mah(wired in parallel) = 3000mah
3000mah = 3ah. so 30c x 3 = 90 amp discharge ability

Wired in series, the discharge ability "as expressed in amp draw" would be 45 amps no matter how many cells are wired in series.

Total "power" is a little different. This is where voltage comes into play and series vs. parallel starts to make more sense. Voltage times amperage = wattage. Wattage is simply an expression of power or energy.

2 x 1500mah 30c Lipo cells wired in series = 7.4volts x 45 amps = 333 watts(power)
Total "capacity" in this example is still 1.5 amp/hours or 1500mah. The voltage doubled with the series connection

2 x 1500mag 30c lipo cells wired in parallel = 3.7volts x 90 amps = 333 watts(power)
Total "capacity" in this example doubled with the parallel conection. the voltage remains 3.7 when wired this way.

In the 2 examples, you can see that you need more than just the cell's "c" rating to determine power - you need the cell's capacity and voltage.