Xiaomi MI power Bank 2 constant of High-Density Lithium Polymer battery. The Dimensions are 135.5×67.6×23.9 which are slightly different from the old version (Mi Power Bank). Mi Power bank takes only two and half hours to charge Mi Max smartphone which has 4,850mAH battery inside it. Mi Power bank is available in White color only. Coming to the product price is Rs.2,199 available at Mi India where a common man can effort.