I used 2 packs of my SMC EnerG's 4600 cells(451sec@ 35Amp, 1.235V, 1.3IR) on Sunday at coventry.Used in an S4 with a Novak 5.5L Brushless system. Really pleased with them.
Well impressed with punch from cells. Never dropped during the 5 Mins race.

Duff cell sorted out on the 3rd pack. SMC sending new cell in post.