SolarGoPack Solar Powered Backpack / 7 Watt Solar Panel and 10K mAh Charging Battery Daypack/Phone and Electronic Device Power Charger Back Pack 7 Watt solar panel generates power from sun to charge the 10,000 mAh battery Charges smartphones and other mobile electronic devices while camping, hiking and traveling SolarGoPack solar power charger backpacks are durable, stylish, flexible, and lightweight Includes Micro USB cables and 10k mAh waterproof li-polymer battery Excellent for travel, sports, hiking, school, and emergency power outages