Here is another solar charger I like - the Anker 15W Dual Ports USB Solar Charger PowerPort Solar .
It is compact, light in weight, and very portable. The elastic loops on each corner makes it easy to attach it to tents, backpacks, trees, etc.The ultra thin design makes it ideal for long treks.
There is a red light that lights up so you know there is power coming through the panel and you can connect your devices to charge. If anyone or anything obstructs the suns view then it will immediately stop charging.
It packs very flat, and easy to throw in a bag. Best part - it has a pouch to throw extra cables in for charging!
