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==FAQ==
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Q1: Can I use this 5V 4A power adapter for fast charging?
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A: No, a regular 5V 4A adapter does not support fast charging. It only provides a fixed 5V output, which is standard but not considered fast charging. Fast charging requires a power adapter that supports multiple voltage outputs such as 5V, 9V, 12V, or 15V, and must comply with fast charging protocols (such as QC, PD, etc.) to negotiate and increase the voltage accordingly.
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