Nien!! the c stands for capacity, normally the constant draw on the pack. You multiply that by the size of your pack. Which is 1200mah or 1.2amps.

So 10X1.2=constant amp draw of 12amps

More than likely the burst is 15sec at 12c so that would give you 14.4amps.

If your run in parallel then you would have 24amp draw 28.8 burst.

I would suggest a bigger battery if you expect to use those motors. Easy way of figuring out what is just to reverse the equation.

so if your need 55amps (go 60-65 just in case) 60 divided by say 20c would give you a 3 amp pack or 3000mah.

Good luck.

Ivan.