Sleek Aluminum 4000 mAh Power Bank

The Sleek Aluminum 4,000 mAh Power Bank has a rechargeable lithium polymer Grade A battery (14.8Wh) with enough power to charge smartphones, MP3 players and tablets with a total output of 5V/2A. The dual output lets you charge two devices simultaneously. It also includes a battery check button to ensure that you know how much battery life is left. The reusable power bank charges via USB-A to Micro cable (included), which can recharge the battery backup or other devices with a micro-USB input, li