Flipkart Mi 20000 mAh Power Bank Offer: Buy Mi 20000 mAh Power Bank (50 W, Fast Charging, Power Delivery 3.0) (Black, Lithium Polymer) from Flipkart. The all-new Mi Power Bank Hypersonic 20000mAh 50W is our Fastest and most versatile power bank yet. This power bank can easily charge power delivery supported laptops at 45W, can charege mobile devices at 50W max output and can recharge its high capacity battery of 20000mAh in just 3hrs and 50mins at 45W max. The power bank features Triple output port and Type-C input port with two-way fast charging without compromising on the number of devices it can charge. Shop now