Ogima&reg; 21W 2-Port USB Solar Charger PowerPort Solar&mdash;High efficiency Fast Charging Solar Panel Cell for iPhone 6/6 Plus, iPad Air 2/mini 3, Galaxy S6/S6 Edge and More Foldable design for easy carry and transport, water resistant to endure all weather conditions, great for nature trips, hiking, picnic, sailing or other outdoor activities 2 USB port maximum output of 2.4A and max total output of 4A, It greatly improves the charging efficiency. High Efficiency: 21W high-efficiency solar panel provides up to 23.5%-25% conversion efficiency, while the monocrystalline panel conversion efficiency is only 15%. Fast charging technology: 3 hours for full charged Iphone. No additional battery needed for charging external devices, 100% green energy with zero carbon footprint, built-in dual USB ports for simultaneously charging two devices. Perfect for rapidly charging Smartphones, Tablets, MP3 Players , GPS Units and more while emergency preparedness, Camping, Hiking , Backpacking and other Outdoor Activities.You get 12-month warranty and friendly customer servic