Ok, I just did a run on 4S 20C 5000mah Turnigy Lipo.
If you compare this graph with the 30C graph above, you will see they are the same!
The numbers are the same. The 20C and the 30C packs are built with the same cell.
I always suspected this.
The 30C is holding 3.635 volts per cell under a 109 amp load
The 20C is holding 3.652 volts per cell under a 108 amp load
