Solar chargers have been around for years. Unfortunately, they've never caught on quite like they should, in part because they tend to take up a lot of space. Thanks to a retractable, roll-out design, the HeLi-On Solar Charger does not. Its solar panel can be used to charge your device directly, or you can harness the sun's power to charge up the internal battery, which can then be used your gadgets even after the sun's gone down. Available in white or blue.