Portable & Waterproof Solar Panel Power Bank w/ Dual-USB Solar Battery Charger for most Smartphones  Dual Ports Charge two devices at the same time while on the go, 2.1A charge provides the fastest charging speed to you. Highest Quality The best eco-friendly silicone protects it from rain, dirt, and shock/drops. It uses lithium polymer batteries with 10000mAh. Equipped with over-charge protection system. Over 1000 recharge life cycle. Wide Compatibility Compatible with most USB-Charged devices such as iPhone, iPad, iPod, Samsung phones, other Android mobile phones, Kindles, Gopro Camera, GPS and other 5V USB Devices Kindly Note Solar charger is mainly for emergency use, not a main charging resource. It takes about 40 Hours to be fully charged under direct sunlight, so it is highly recommended to charge by wall charger, which only takes about several hours. Product Specifications: Battery type: Li-polymer battery Solar Charger: Max.5V 20000mAh Input: DC 5V/1A Output: DC Dual Ports