To charge this power bank 5V supply is needed through micro USB. It says FOR the power bank the charge current: ≤ 2200 mA.

What does that indicate for the power supply max current which charges this power bank? Does that mean one should use a 5V supply/adapter with Imax>2.2A or Imax<2.2A?

(Normally when we use a supply for a device we apply exact voltage with minimum current the device needs or more. For example a device with input sepcs 5V 2A would work fine with a supply rated for 5V 4A. But it wouldnt work for 5V 0.5A)

But in this case it is not that clear to me.


The power bank should internally limit the charging current to a safe level, and automatically ramp the current down when approaching a fully charged state.

Therefore you can safely use a 5V 3A power supply.

  • \$\begingroup\$ How about using 5V 500mA supply. Would that load the power supply a lot? \$\endgroup\$
    – floppy380
    Nov 18 '19 at 13:25
  • \$\begingroup\$ It’s har to tell without knowing more about its internal design. But my guess is that it should be designed to be plugged into a ‘standard’ USB 2.0 socket which is only required to deliver 500mA. \$\endgroup\$ Nov 18 '19 at 13:30

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