title_body: Is there a benefit to using multiple capacitors on FPV drones? From what I've heard, you need at least one capacitor on the ESC of a drone so that it can smooth out the voltage spikes to prevent electrical noise and improve the longevity of the ESC. If this is the case, wouldn't having more than one capacitor wired in parallel help further smooth out voltage spikes? Say on a 5'' drone, would it be worth the extra weight to have 3 capacitors instead of 1?
upvoted_answer: Capacitors come in various sizes and values, so one big capacitor could equal two smaller ones in value; I do not know for certain if this offers a weight saving, but can reduce PCB footprint size by being 'taller' (although, you can stack capacitors of the same footprint.)
  A reason to have more than one would be to adjust the frequency response, as a capacitor's reactance is related to the frequency and the capacitance:
  $$X_c=\frac{1}{2\pi fC}$$
  where $X_c$ is the capacitor's reactance, $f$ is the frequency of the spike/noise and $C$ is the capacitor value.
  To this end, you often see multiple capacitors for decoupling or filters; however, in an application where the aim is to decrease voltage sag it is less crucial. There are almost certainly more capacitors on the board, which may be in parallel to the larger capacitors (design dependent), but positioned close to the ICs and other parts so that each component gets the voltage it requires.