(Note: TCW is not being compensated for the product featured in this video.) The "Ryno Tuff Foldable Solar Charger" can be used for outdoor excursions, or when you find yourself in any place without sufficient power.
This solar charger charges your device when exposed to sunlight - it has no internal battery. It takes solar energy and converts it to a current so you can charge your device without a power source. There also is a model sold by Rhino Tuff (with an integrated battery for its solar charger) that can charge your device when there is no sunlight. VIEW related video: "Solar Cook Fish (Be Prepared for The 3 Days of Darkness)" at: tinyurl.com/dhrjr6sf