_**Promotional power banks**_ are distributed by various organizations to their customers during any events, trade shows, etc. to let them charge their mobile phone, portable speakers, MP3 players, etc. There are varieties of shapes and size of the power bank to suit many different people in different places. The power banks can easily serve the charging needs of the individual at home, office or while on the go. The use of the power bank alleviates the worry of charging the mobile phone anywhere and the user does not get out of their battery by using custom power banks.