I have to agree with TFG.

I have run against other mini drivers using the IP 3800 50C and have beaten them using the IP 4200 40C Lipo stickpack. Really you just want a battery that will maintain high voltage throughout your run.

We only race for 5 to 6 minutes depending on where you race. I just ensure my batteries are fully charged and change them over regularly, as I believe newer packs have higher voltage.

I prefer my mini Lipo packs to have Deans plugs fitted, so I do not reverse the battery wires and BIP my ESC....

Just my thoughts.

Calvin.