Forever TB-300 20000 mAh Powerbank with 22.5W Fast Charging. A reliable source of energy in any situation, the Forever TB-300 is an efficient and versatile 20000 mAh powerbank that meets the demands of modern mobile devices. Thanks to 22.5W fast charging with Power Delivery (PD) and Quick Charge (QC) technologies, you can charge your smartphone, tablet, or wireless headphones in less time.