Amperage

Power & Charging

The amount of electrical current flowing through a cable, measured in amps (A).

Amperage determines how quickly energy is delivered. USB-C cables are rated for either 3A or 5A. A 5A cable with e-marker can deliver up to 100W at 20V. Using a 3A cable on a 100W charger will cause the charger to negotiate down to 60W for safety.

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