IIRC the graph was based on a 20A bulb discharger where TheJANG felt that was the average draw from a typical 1/10 car on a race track, notice each pack was drained at about the 10 min mark which indicates (to me) that this was a reasonable test. In the testing I've done, the higher the voltage is directly related to a higher C rating, I have produced similar graphs myself and used a multiplier of C rating x Capacity and referenced it as rA (relative amps) that a pack is advertised to handle under load.




*** In a racing condition, it's the voltage under load for the first 5-8 min (however long your main) that is most important, voltage toward the end of the curve is irrelevant on a track.