A Power Bank is usually a portable charger that is designed to recharge the electronic devices while you are on the move i.e. travelling.
These come in a wide range of sizes i.e. from slim & small, pocket-sized gadgets up to the larger and higher-capacity ones. Power Banks can help to charge your smartphones, tablets, and other devices etc.
At times when you need some source of power in order to charge your smartphones, the power banks can come in handy in such situations. You can use your phone without any interruptions. These make your life easy by adding comfort in it.