Is fast charging better 2A or 3A?

smartphones takes only the power it needs or handles upto. so you wont see any difference between 3A charger and 2A charger if your phone can support upto 5V 2A charging. But if your phone can take 3A of higher, You will find 3A charger faster than 2A charger As it takes more power available to charge the battery.



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A is how fast it charges. Think of it as charging 1000mAh per hour, 2000mAh per hour, or 3000mAh per hour. Since your battery is a 2000mAh battery charging it at 2A or 3A should be fine. Unless I was in a hurry I would normally charge it at 2A.

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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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If you will be monitoring the charge actively, you can punch up the 10A rate. If you will be walking away from it for hours or days, select 2A and that will better approximate the trickle charging it should get when full, so you will do less damage.

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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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2A is the amount of amperage that is suggested to recharge the battery. This dose not mean that a transformer of lesser amperage won't charge it it would just take longe. Think of amperage as a pipe the larger than amperage the bigger the pipe.

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