The Anker Power Core Metro Essential 20000PD is a high-capacity power bank designed for heavy-duty charging needs. With a massive 20,000mAh capacity and USB-C Power Delivery (PD), it can charge laptops, iPhones, and other USB-C devices at lightning speed. The compact design makes it portable despite its large capacity. Capacity: 20000mAh, Power Output: USB-C 20W, USB-A 12W, Input: USB-C 5V/2A. Compatibility: Laptops, iPhones, iPads.