Power Bank is the English term for rechargeable lithium ion or lithium polymer batteries with Universal Serial Bus (USB) and Micro USB output charge electronic devices Mobile phone, tablet or an e- book. In Castilian is called external battery .there are thousands of sellers and suppliers of power banks who offer you different types of power banks in your city and from other cities of the world. Buyer can now search for sellers and dealers from the list of dealers of power banks given on the website of eWorldTrade. Buy top quality of product that you need from the sellers and suppliers now.