The Belkin BoostCharge 20K is a portable charger with a high capacity of 20,000mAh, which can provide up to 78 additional hours of battery life to your smartphone according to Belkin. It features a USB-C port with support for Power Delivery for fast charging, and two USB-A ports so you can charge up to three devices at once. PRODUCT SPECIFICATIONS: Manufacturer: Belkin Total power: 15W Ports: 2 USB-A, 1 USB-C Cable length: 6 inch Dimensions: 6.19 x 1.02 x 2.94 inch