? about caps

[What's_nitro?]

Oh yeah, forgot that part.

The low resistance lets the caps absorb energy more quickly as well. During braking there are huge voltage spikes sent back to the battery through the ESC. The caps take in the spikes but let most off the current flow into the battery to slow the vehicle. Now, this is only if the ESC uses regenerative braking. I think most ESC's do. There is also another way called "shunt braking" in which the motor phases are effectively shorted out by the FET stages of the ESC. The shorting is controlled by a PWM signal sent to the FET so as not to allow a "dead short". This type of braking does not benefit from additional capacitors.