Built with quality from start to finish. Overall quality improvements and superior hand feel are achieved with the usage of high quality, environment friendly PC + ABS material. The perforated exterior provides a scratch-resistant, comfortable and slip-resistant hold. The all-new 20000mAh Mi Power Bank 2i is a demonstration of elegant utility. Using advanced battery technologies from ATL and Lishen, the new-generation Power Bank is both, light and high on performance. Weighing merely 358 g, you can carry the 20000mAh Mi Power Bank 2i anywhere without adding extra bulk.  The all-new 20000mAh Mi Power Bank 2i is compatible with a wide range of devices and intelligently adjusts power output to match device’s requirement. When you charge 2 devices simultaneously, you can expect 5.1V/ 3.6A dual output.