I am new to PCB design and am building a PCB circuit powered by a 2200mAH, 25C , 3S lipo battery, the maximum current that will be drawn from this would be 13 Amps. 

I usually use the trace calculator to figure out the thickness of the trace. However, this is the first time i am working with current greater than 2 Amps. So, i just want to make sure i dont have to do something special, when designing a 2 layer pcb that has 13 amps of current running through its veins.