The Anker 537 Powerbank is a high-capacity 24,000mAh power bank designed for charging laptops and other high-power devices. With support for 65W fast charging, it can charge laptops, smartphones, and other USB-C devices at lightning speed. The compact design makes it portable despite its large capacity. Capacity: 24000mAh, Input: USB-C 5V/2A, Output: USB-C 65W. Compatibility: Laptops, smartphones, tablets.