- Jan 06, 2018 -
The USB charger interface is 2A. How much current should be used for USB data cables?
2A is better
But your wire is 1a, it's fine, the resistance is large, and it's likely to have a larger line loss.
For example, it is home 220V voltage, but you have thin wire, heat, high power electrical appliances, the voltage will not be enough, it is better to change a bit.
And it's relatively fast to use 2A, and it's safer and faster with matched data lines.