ZEEFO 21W Solar Charger With SunPower Portable and Foldable Solar Panels, Solar Battery Chargers with 2-Port USB High- Efficiency solar Panel For Mobile Devices outdoor for Travel, Camping, Hiking ZEEFO High-Efficiency Solar Panels. The solar charger greatly shortens the charging time by half, as compared to traditional panels. Our Current Solar Bag has a Smart IC, which can automatically Identifies the Input current of the charging device, thereby regulating the output current. Incredibly Durable: Industrial-strength PET polymer faced solar panels sewn into a rugged polyester canvas offer weather-resistant outdoor durability. High efficiency: Solar conversion efficiency of up to 23.5%. Foldable design for easy transport-great for camping, hiking, picnics, and other outdoor activities. Charging under strong sunlight ensures best charging efficiency. ZEEFO PowerPort Solar, charge with the power of the sun. Faster and Safer charging with our advanced technology. Unique design with stand and hook-hole allows usage in any condition.