Increasing the current from charging?

Question

USB

At the output of the usb wire, you need to get power for 5 volts and 4 amperes. If you take 1 charging unit with 2 usb ports (5 volts, 2 amps) and connect 2 usb plugs in parallel to 1 wire, then the output will be 5 volts and 4 amps?

Answer 1

no, it doesn’t work that way, you need a 'minimal' circuit, which, for example, through the alternate charging of a pair of capacitors, 'adds the initial currents'
Perhaps schematically everything is a little more complicated, but they use it, for example, I had something like this external box for hdd, powered by two usb2. 0

Answer 2

no
, you need to take a block for 4A