The ONsite USB-C 100W PD Battery Pack boasts high capacity Power Delivery (PD) that is required for USB-C charging laptops like the MacBook Pro, MacBook Air, and other devices. This battery pack can power one USB-C and two USB devices simultaneously. The 26,800 mAh battery feature can charge a MacBook 13in Pro 1.6 times. In addition, an Ipad Pro can charge two times and 5 charges for mobile phones. Because photographers spend time editing, reviewing images, and client review sessions through the use of a portable laptop, the Tether Tools ONsite USB-C 100W PD 26,800 mAh Battery Pack has been designed to keep you powered all day long.