Innoo Tech 10000mAh Solar Charger with Sunpower Panel, Outdoor Solar Power Bank, Solar Battery Charger , Dual USB Port with Led Light, Waterproof, Dust-Proof and Shock-Resistant High Conversion Efficiency -- Built with SUNPOWER solar panel, solar conversion efficiency up to 21.5%-23.5%, 80% higher than normal solar panel. IPX5 Level Waterproof -- Tested that totally safe from water splash or rain. Built-in 10000mAh Capacity -- Built with high efficiency lithium polymer battery with over 800 times complete charge and discharge cycle. PowerSmart Technology -- Detects the fastest possible input current for the connected device up to 2.1A overall. Multiple Protection -- Optimized smart microchips&nbsp;with overload, over discharge and short circuit protection.