1. Please charge it under STRONG sunlight, do not charge it in cloudy day or the place through glass(e.g a window or car)2. Solar charging is designed for emergencies, not a primary source of charging due to the compact solar panel size and sunlight intensity, it could take 37 hours under direst strong light to fully charge(there are 7-8 hours of sunlight per day). So we highly recommend charge the solar charger via an adapter or computer, which only take a few hours3. There are 4 lights, the first light means 0-25% battery left, the second is 25-50%, the third is 50-75%, and the fourth is 75-100%. Normally, it can reach 30% battery after 7 hours recharge under strong sunlight, so only the first light will on*Dual Ports -- Charge two devices at the same time while on the go, the quick 2.1A charge provide the fastest charging speed to you.
*Highest Quality Materials -- The best environmentally friendly silicone protects it from rain, dirt, and shock/drops. It uses lithium polymer batteries with 10000mAh. Equipped with over-charge protection system. Over 500+ recharge lifecycle.*Wide Compatibility -- Compatible with most USB-Charged devices such as iPhone, iPad, iPod, Samsung phones, other Android mobile phones, Kindles, Gopro Camera, GPS and MoreSafety ProtectionThe solar panel is FCC, RoHS, CE certified. Short circuit and surge protection technology keep you and your devices safeSpecification* Battery type: Li-polymer battery* Capacity: 10000mAh* Solar Charger: Max.5V 200mAh* Input: DC 5V/1A* Output:DC 5V/1A; 5V2.1A* Size: 135 x 72 x 15mm/ 5.3 x 2.8 x0.59inch* Weight: 203g /7.1OuncePackage1 x 10,000 mAh Solar Charger1 x Micro USB cable1 x Instruction Manual