Solar Charger, iBeek Portable 10000mAh Dual USB Solar Battery Charger External Battery Pack Phone Charger Power Bank with Flashlight & Compass for Outdoors (Rainproof, Dust-proof, Shockproof) - Black 10000mah High Capacity: Built-in 10000mAh high capacity polymer battery equipped with a compact solar panel, which could recharge the battery itself under sunlight for emergency purpose while outdoor. Dual USB Charger Ports with Cover: 2.1A USB port for iPad/Tablets. 1.0A USB ports for smartphone or other devices; can charge two devices simultaneously, support all digital electronic devices with 5V/1A-2.1A input. Dual LED Flashlight & Built-in Compass: The 2 LED flashlight is bright, works perfectly in darkness, especially for emergency. It comes with 3 light Modes (Steady light /SOS /Strobe); Built-in Smart Compass on the back surface, it will be very helpful if got lost in outdoors. Superior Portability Design: Comes with the free hook, easy to hang on your backpack when outdoors; Waterproof, Dust-proof and Shock-Resistant, perfect for hiking, climbing, camping and other outdoor activity. The efficiency of energy transformation from solar to electric energy is really low, even in a perfect laboratory condition, the transformation efficiency just 30%. It's only recommended for EMERGENCY use, please DO NOT take it as primary power resource. For daily use, please use provided charging cable via outlet to charge the power bank.