There’s no USB-A port if you still need the old USB standard. The smart display shows you how ... if your plane seat includes a regular AC power socket. Remember that you might need a travel ...

A device that transfers power to smartphones, tablets and myriad portable devices. USB chargers plug into an AC outlet and provide a USB Type A or Type C socket to cable DC power to the device.

Most modern cars offer at least two ways to charge up a smartphone, in the form of a 12V lighter socket ... USB ports are created equally, and those fitted to cars often deliver far less power ...