This power bank acts as a saviour when you are travelling or when there is no electricity at home.The body of this product is made of metal. It has an internal lithium-ion battery with 2200 mAh capability to charge your mobile phones anywhere. It has a USB port with 5.0V/1A output and an input port of 1 micro USB. There is an LED indicator on the top to remind when the product needs charging. The package has a USB cable to help you charge anywhere. They are shock resistant and waterproof. Today, these power banks are growing popular with all smartphone users.