The new Sherpas feature the latest in thin-pack lithium technology and are handily equipped with the cables you need to charge your devices on-the-go. On-board cable options include Lightning, micro USB, and USB-C. With no seams to break or crack, the Sherpa’s extruded aluminum body is not only beautiful, it’s durable as well with a premium feel. They also slide easily into any backpack or tablet sleeve. The Sherpa 40 can be recharged from a wall charger in about 7.5 hours. The Sherpa 40 is great for charging your smartphone, tablet, and smaller devices.