I need a little guidance. My son and I are new to the sport and about to purchase two Slash 4X4 RTR trucks. We are looking at the Onyx 245 charger so that we can charge two at once, but are unsure of where to go with batteries. The primary use will be bashing at home, (we have a BMX dirt track to drive them on), but we would also like to race “recreationally”. That is where the question comes from. We want long battery life while at home, but want enough battery to “have a chance” at the track. I have settled on a 5000 to 6000 mah batteries, but I am lost on selecting the best discharge rate. What impact will I see from a 25C verses a 25-50C? How high of a C rating should I look for based on the usage described above, and why? Any insight would be greatly appreciated.