We are professional solar chargerÿfactory in Chinaÿwith more than 10 years expierance in making solar products. We provide warranty of 1 year andÿ5 days no reason return for defect solar chargers.ÿThisÿfoldable solar charger bag directly charges cell phones and other 5 volt usb rechargeable devices – virtually any portable cell phone or device that can charge with a usb cable will work with this portable solar charger. This folding solar charger also charges laptops with 13-18v output.