Solar Charger, Pobon Portable 10000mAh Dual USB output Power Bank Solar Battery Charger Powered Phone Charger External Battery Pack with LED Light for Emergency Cell Phones iPad GPS & Camera (Black) 1. 10000mah High Capacity Power Bank: Built-in 10000mAh high capacity lithium Polymer battery cells, anti-explosion, lightweight, compact and reliable. Long lifespan with more than 500 recharging times; equipped with a compact solar panel, which could recharge the battery itself under sunlight for emergency purpose while outdoor. 2. Universal device compatibility/ Dual USB Ports: 2.0A USB port for iPad/Tablets. 1.0A USB ports for iPhone Samsung LG Smartphones or other devices. Can charge two devices simultaneously, and support all digital electronic devices with 5V/1A-2.0A input, like iPod, Apple Watch, Gopro Camera, GPS etc. 3. Superior portability design: Easily hang it on your bagpack with the inluded strap, hands-free on the go. Perfect for hiking, climbing, traveling or other outdoor activity. 4. The LED flashlight works perfectly in darkness, especially for emergency. Just press the button twice, the LED will light up; 4 LED indicators show the charging and discharging process. 5.  45 days money-back & 1 year worry-free warranty, and friendly 24-hours email contact service is available. Welcome to reach out to us first if you have any issue, thanks. The efficiency of energy transformation from solar to electric energy is really low, even in a perfect laboratory condition, the transformation efficiency just 30%. We suggest you recharge it via wall charger at the beginning, to make the power battery fully activated.