Wall charger is a convenient device to charge your phone at home, in the office or anywhere with a power source. GaN wall charger, the most common form of USB wall plug chargers, can be a single wall charger or a multiple port wall charger.

A power bank has one or more USB ports to allow for multiple devices. You can even charge up to 4 gadgets simultaneously with some portable power banks. Your gadget will once more have power if you insert the charging cord into a USB port on your portable power bank. It's that simple! A LED indicator that shows how much power is remaining can be found on many portable power banks.