Hello. I have already tried several power banks and somehow the charging current always seems to be too low (or too high?). In any case, my mobile does not charge. Can you assure me that the charging current of this device will work with my mobile phones (1*Pixel 4a + 1*Pixel 4a5g)? Thank you very much MfG Marco von Atzigen PS: Based on Sweethome-2016's question, I assume that I always charge the device itself via USB, correct?