How to determine what "C" rating to buy?

[bob_t]

Here is my question ... is it possible to have a battery with too high "C" rating? For instance, for my stock MG29, PB manual recommends 25C and the ESC is 45A rated. Mystic has a 60A ESC and that manual recommends 30C batteries. Revolt 30, with 60A ESC recommends either 30C or 40C. So, is it better to have the battery limiting item, or the motor/ESC. I know the motor is going to draw whatever it needs, or whatever the battery can provide, so, for example, if I put the 40C battery in my MG29 with the 45A ESC, would it be more likely to smoke the ESC, than running a 25C battery, assuming equal motor load. Likewise, if I were to significantly overprop the boat, the ESC/motor would want more that the 25C battery could deliver and the battery would be the limiting item (ruin the battery?). Reason I'm asking is that now that I am getting more boats, with different recommended "C" ratings, can I consolidate my batteries to buying all 40C ratings, or do I need to keep them segregated for each boats "recommended" rating?

Thanks,
Bob

[TheShaughnessy]

c rating is just what the pack is capable of delivering. Just like the motor will only pull the current it needs the battery will only supply the current that is being called for. You can run 65c with no greater risk of burning up stuff then a 40c or even a 25c.

I'm no expert on this but from what i've read ripple current is not good for esc's so a higher rated c batt would give less ripple current and actually help the electronics to run better.

In short you are fine to consolidate to all 40 c batts no need for 25 c

[Chilli]

Your amp draw will increase a little with higher C rating packs because the higher rated packs allow current to flow more freely. The increase will be more substantial if the lower rated packs are old, low quality or pushed to their limits. If this increase is enough to blow a speed controller, you are probably pushing your equipment too hard to begin with. And if your pushing your amps too high, the lower rated packs have just as much chance doing damage to your controller due to ripple current which TheShaughnesy mentioned above.

So the bottom line is get the best, highest quality packs you are willing to pay for and be careful when propping up.