Poweradd 14W Solar Charger with Enhanced USB Port for iPhone 6s/Plus/6/5s/5/5c/4s, iPad mini, Android, Samsung Galaxy, HTC, LG, Nexus, Gopro, External Battery, Power Bank (Foldable, Portable for Hiking, Camping, Backpacking) Enhanced Version: Built with US made SUNPOWER solar arrays, solar conversion efficiency up to 23.5%, while most panels in the market are only 18%. Powered up with free solar energy anywhere. Exclusive Fast Charging Technology: Automatically detect the max charging current and voltage of your devices, fastest possible charging speed up to 2.1 Amps under direct sunlight. Concentrate the current in one efficient USB port instead of unstable dual USB ports. Industry-Leading Warranty: 24 months limited product warranty, 24h*7d Customer Service and Technical Support. High Quality: PET laminated solar panels with high-wear PVC fabric, ensures waterproof and weather-resistant durability. Portable and Foldable Design: 1.8x6.3x0.35 inches folded size with well-placed eye-holes for easy attachment to backpacks, trees or tents, smart choice for camping, hiking, backpacking, cycling, other outdoor activities and trips.