RE:
The higher the "C" rating, the lower the battery's internal resistance. If you have a speed control and motor that can draw 60A, then the lipo ideally should be capable of delivering close to twice that current.
So, a 3300mah battery rated at say 20C can supposedly provide a maximum current of 66A, and is less than recommended for a 60A motor and speed controller. A 30-35C battery is much better. (99-115)
A 25C 3300mah battery can deliver 82A.
Remember that the C rating should not be considered a continuous rating if you plan on using the battery more than a few times.
The typical (for me) use - -
Take off 4s 3300mah Lipo Max current is limited to either 60A due to the speed control, or up to about 80A (battery & speed control combo)
As soon as the plane is in the air and stable, power is reduced, to just above 1/2 throttle for normal flying. This usually results in 5 to 6 minute flying times without overly discharging the battery.