The power bank is an innovative and convenient way of charging various electronic device which includes a mobile phone, tabs, camera, MP3 speakers etc. It is a portable device and can be carried to many places and there will be no more stress of smartphoneâ€™s drained battery. In this tech-savvy world, most of the companies gift custom power banks to their potential customers. This product acts as one of the most useful product to beat the market competition. This device can be used by any person who needs a portable backup when there is no power supply available nearby.