Only essential electronics are active when the car is cranking. A typical new battery can output 650 amps when fully charged. But it’s fairly rare to be fully charged. Depending on that size of the motor the starter uses (I’ve measured no less than) 120 amps. If your car starts quickly this is okay, you could run entertainment systems while cranking, but if it takes a while to catch then you need to keep more power reserved for the heavy stuff.
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