Can the phone be charged from 2A?

Question

Mobile devices

There is a smartphone with a 1.3A charger. On the Internet they write that the main parameter is voltage, and amps only affect the charging speed. But nowhere is it said why many power banks have two ports for 1 and 2A. Why do they do it? Why not just do 3A? After all, this will not kill the phone and the battery?

Answer 1

The phone / tablet controller simply won't take more than it can "chew", and this is now a maximum of 2A.
A typical mass power bank controller is designed for 3A, so they make 2 + 1.
The next limitation is in the cable, not every cable can transmit 5V at A> 2.
For such cases, they came up with Qualcomm Quick Charge, which uses 9-19V, if I'm not mistaken, so can transmit 36W

Answer 2

You can even charge from 10A, it will not be worse. The main thing is not to overvoltage.
If the current given to the phone (battery) is less than necessary, it will take longer to charge.
In the Power bank, why 2 ports I will not say for sure. I took it apart to see mine - it seems that for savings. If you have a weak consumer, you can use port 1A with a weak cheap converter. Think so.

Answer 3

It is not the current that is stabilized, but the voltage - so there will be no problems.
But the current of the memory is, if we simplify it as much as possible, then just the load reserve that it can withstand. So, charge - do not be afraid.

Answer 4

Usually, chargers for tablets are 2A, smartphones are 1A-1.5A.
I once had a sony ion charge 2A, nothing terrible happened to him)