Meet the Solar Page: a compact, slim, and lightweight solar charger that fits inside your binder and lets you charge your smartphone, and other gadgets, fast. The device has a solar efficiency of 22% and output of 5V/1A to charge an iPhone 6 from 0% to 100% in about 2.5 hours. The device measures 85mm x 185 mm x 3mm when folded. You can easily carry it with your notes to keep your smartphone charged during the day. Find out more about it on yolkstation.com.