Can a 20 C 2100 pack give better performance than a 10 C 2100 pack ?
This is if the amp draw of the motor is under 20A in both cases.

Thanks in advance

Fred..

Yes, of course.
The 20C battery should hold its voltage better at same load as the 10C battery.

Exactly! Put your wattmeter inline (you DO have a wattmeter, don't you?) and watch the voltage drop at wide open throttle. You should see a big difference between the two batteries.

- Jeff

yeah, for the most part I would agree. If mfg's weren't so eager to over rate their packs, then no there should be no difference ideally. In the real world you will probably notice a difference though. The better the 10C pack you have the smaller the difference would be. Of course though if you are running a battery pack up within 10% of its max cont rating, it's not going to last as many cycles as the 20C pack that you are running about 45% of its rating.