I'm not an expert, but this is how I see it, from a indoor clay racing view:

- mah ratings means how long the battery will last.
- I like the 3600, HV Maclan or Reedy batteries. These are about 50g lighter, and enough power for 2wd buggy stock and Mod, 13.5 Stadium Truck and 13.5 4wd Buggy, for 5 or 6 minute runs.
- I like the 4800, HV Maclan or Reedy batteries for the classes that draw more power or where the vehicles are under weight. 2wd Stock buggy, just to make weight. 13.5 Shortcourse, to make weight.
- The longer 6400 or more, HV Maclan or Reedy, for 4x4 Mod Shortcourse. Good for 10 minutes, These tanks like power.

I tend to think the C Ratings are more how fast you can charge / discharge. I know this rating is more pulled out of a hat. The Maclan HV and Reedy HV are all 120C, if I remember correctly.

Stock Classes, after the race Cycle Discharge at 30 amps, then charge at 30 amps. This tends to lower the internal Resistance and can help for more punch in Stock. I would only do this is your racing is at a point where you are not crashing and need like .2 seconds per lap to compete. Been doing this for over a year and these batteries are still strong. Race every weekend. Run the same battery in the same car for all practice/races.

Mod Classes, I just Charge at 10 amps, before I race. They don't need punch and Internal Resistance is not a factor.

Just my 2 cents. Sure everyone will have different opinions. I also here there are really only a couple of places the batteries are made. So I am convinced Reedy and Maclan are the same battery. They sure act the same.