2x10 controller for gearhead motor

hi

From my understanding, the DC motor will drain current at start up. Some batteries will not be able to hnadle the high current drain, does this mean that I will nead a capacitor to provide the high current over the short period of time?
OR will the controller supply the required current?

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Can you define any of this? You’re talking about a 10 amp motor controller. What motor are you wanting to use? What batteries? I can’t think of any reason you would need a capacitor to handle the current surge when starting a motor unless the battery is severely undersized for the job.