Solar Charger, Solar Power Bank by Edaisy 12000mAh External Backup Battery Pack Dual USB Solar Panel Charger with LED Light Carabiner Portable for Emergency Outdoor Camping Travel-Black

Try this solar battery charger it really works. It charged my phone from 4% to 80% in almost 2 hours. You can charge it by a usb charger or just by the sun. I love the built in flash light on it. This is great to have for an emergency. You can simply store anywhere there is direct sun light. I have mine on my dashboard in my car. http://www.amazon.com/gp/product/B01IHSP8NA/