Can I use A 5V 2A charger with A 5V 3A device?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.



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3A cable simply it means the cable can withstand if current draw at 3A (theory measure) if the current draw goes over than 3A it will get heated up and burnt (damage). Therefore 3A cable simply good for 2A/5, 1A/10, and 3A/3v all perfectly fit in the current draw.

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