The most direct method is the nameplate of the charger.
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1. If you see the maximum output voltage marked on the charger nameplate is 5V and the maximum output current is 2A, then this is an ordinary charger.
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2. If you see the charger nameplate marked \"QUICK CHARGE\
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3. If you see \"SuperCharge\" marked on the charger nameplate, the maximum output voltage is 5V, and the maximum output current is 4.5A, it can be judged as a super fast charger, and compatible with 5V\/2A.