Voltaic Systems "Fuse 4W" 4.0W Portable Solar Charger and 4,000mAh USB Battery Backup Bank for iPhone, iPad, Samsung Galaxy, Android, and HTC Devices - 1021-S PANELS - 2 rugged monocrystalline solar panel with 4.4W total peak output at 6V or 12V. The panels are waterproof, lightweight, and coated in self-healing urethane to withstand abuse and resist scratches. BATTERY - The system includes a removable and portable V15 backup battery pack; a 4,000mAh, 15Wh universal battery to store power and charge your devices. The battery can also be charged from any standard USB port with the included micro USB adapter and USB cable. CHARGING - 3.5 hours in the sun charges most smartphones completely, 1 hour in the sun provides 3 hours of smartphone use, 1.5x smartphone charges from the included V15 battery. 8 hours in the sun charges most 7" tablets completely, 1.1 hour in the sun provides 1 hour of tablet use, .65x tablet charges from the included battery. COMPATIBILITY - Designed to power and charge thousands of devices that charge from USB, including various handheld devices and smartphones, and DSLR camera batteries. Apple iPhone, iPod, iPad, Samsung, Sony, Nikon, Canon, Blackberry, and other Android devices. DESIGN - Our solar charger is made of lightweight, water, and UV resistant fabric manufactured from recycled PET (soda bottles) and comes with a universal attachment system with four male/female clip sets.