Is the 'Power' of the battery only determine by the 'C' value and independent of the 'mah' value of the battery?
For example, 25c 3600mah battery should has same Power as 25c 5000mah battery. The only different is that the 25c 5000mah battery has a higher storage capacity and can play for longer time.
Max Amp = C x mAh / 1000
eg: 5000mAh @ 40C => 40 x 5000 / 1000 = 40 x 5 = 200A
Power = Current x Voltage
so Power = 200A x 7.4v = 1480Watts
(please note that will be a voltage drop at very high current, so 7.4V is just an assumption.)