Introducing the Yolk Solar Paper, the world’s thinnest lightweight solar charger. Looking just like a small booklet, this system lets you top up on the go. Simply hang the Solar Paper Charger or set it in the sun. Absorbing energy from the sun, the device delivers power through the built-in USB port. The Solar Paper Charger consists of two panels; the main panel and the sub panel. The device can fully recharge your iPhone 6 in only 2.5 hours while absorbing energy. Incredibly, the Solar Panel Charger is expandable. You can easily add extra panels as you see fit. At its smallest, the Solar Paper Charger easily stashes in your bag or even your pocket. Because it comes with a hanging mechanism, you can attach it to your backpack while you hike or even a tree while you set up camp.