Solio Classic-i Hybrid Solar Charger Multi-device charger :Works with 3200+ devices. Stores Power: Holds a charge up to one year Hybrid versatility: Charge it from the sun via USB port or from an optional wall charger. Intelligent Charging: No overcharging just right. iGo Tips NOT included Hybrid solar charger with built-in 1,650 mAh lithium-ion battery Battery recharges via solar panels, computer (USB), or wall socket Provides power to more than 3,200 portable electronic devices Solar panels are 20 percent more efficient than earlier models Measures 2.5 x 1.3 x 4.7 inches (W x H x D); weighs 2.75 ounces