“If a cable is ‘fast charging,’ does the power brick have to be ‘fast charging’ as well?”

(Answer requested by Chris Parson.)

Absent proprietary weirdness (e.g. nonstandard plugs or connectors), no.

Charging speed is driven primarily by the charger and device’s battery. A “fast-charging cable” is simply one that’s rated to safely carry the higher voltages and amperages that fast chargers employ. That usually means the “fast” cables have somewhat heavier-gauge internal wires and insulation than standard cables.

But a fast-charge-capable cable does not require a fast charger. Wires are wires, and a fast-charge-capable cable will work fine with lower-rated (e.g. non-‘fast’) chargers and devices, too — albeit with no speed up.

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