The solar charger built-in 5000mAh high capacity polymer battery, compatible with all of USB devices, it can charge multiple devices many times,it can be recharged via USB as well as through the solar panels. But solar charging is slower, so it is for emergency purposes only.The charger built-in two 5V/ 2.1A USB output ports.It featured with bright LED flashlights.And the charger made of premium ABS+PC+Silicone material,has waterproof, dust-proof and shockproof.