Utilizes solar technology which allows you to conveniently charge iPods, cell phones, iPhones and PDAs in light with high efficiency Charges most devices in approximately 2 hours Adapters are included for the iPhone, iPod, Samsung, LG, Nokia and Motorola; additional adapters are available Extra heavy-duty stitching throughout the bag Fully padded back panel with spiral channel for air ventilation Headphone port allows listening while charging Laptop sleeve supporting notebooks up to 15.4" Multiple exterior and interior pockets Waist belt with stability adjustment Extra heavy-duty stitching throughout the bag Fully padded back panel with spiral channel for air ventilation Headphone port that allows you to listen while you're charging Alternative energy solution to keep your electronic devices fully charged Solar Panel: Substance Type: 2mm plastic/aluminum Cell Type: Monocrystalline Cell Efficiency: 17.6% Open Circuit Voltage: 6.25 V Peak Current: 300 mA Peak Watt: 1.8 W Enough to charge most portable electronics (does not charge laptops) Approximate Input Charging Times in Direct Sunlight: V-Dimensions Battery Pack: 7 hrs; iPhone: 7 hrs; iPod: 3.5 hrs; cell phone: 3.5 hrs; GPS: 3.5 hrs Panel Dimensions: 4.5" x 5.75" Panel Weight: 1.5 oz. Battery Pack: Output Voltage: 5 V Output Capacity: 2200 mHa Output Current: 700 mA Charge Time: USB or wall outlet: 3 hrs; Solar Charge: 7 hrs Battery Type: Ni-MH Battery Dimensions: 3.25" x 3" x 1" Battery Weight: 4 oz.