Power Bank Market Size and Forecast (2022 - 2031): Global and Regional Share, Trends, and Growth Opportunity Analysis by Capacity (Below 5,000 mAh, 5,000-10,000 mAh, 10,000-20,000 mAh, Above 20,000 mAh), by Battery Type (Lithium-Ion, Lithium-Polymer, Nickel-Metal Hydride), by Port Type (USB-A, USB-C, Micro-USB, Lightning), by Application (Consumer Electronics, Automotive, Industrial, Healthcare, Others), and by Region (North America, Europe, Asia-Pacific, Latin America, and Middle East & Africa)