Power bank has a large battery capacity of 42800mAh, and uses high-density batteries to load a larger capacity without changing the volume and weight. The super battery life allows you to get rid of the anxiety and worries about the depletion of the device power anytime and anywhere. Solar power bank uses strong professional ABS material, Chemical resistant, heat-resistant, and has super surface hardness, high elasticity and toughness. IP67 waterproof,drop-proof and dust-proof, so you no longer worry about damage caused by water/drop, it can work in extreme environments. With more than 1600+ charging life cycles, it is very reliable and durable. Power bank is equipped with a super bright LED flashlight with a long range and four functional modes. It can work continuously for up to 100 hours. The ability to send SOS signal mode may be able to save your life at critical moments. Solar power bank is compatible with all USB devices such as smartphones and tablets. The product has 2 USB output ports, if the device is compatible, it can support the QC3.0 fast charge protocol. Friendly reminder:When the solar panel is being cared for, it will generate current to charge the battery, and the indicator light will flash.Solar charging is affected by the instability of sunshine intensity and duration. The battery capacity of the product is very large, so the charging will be very slow and should be used as an emergency function. For daily charging, please use a charger with a power above 5V2A to charge the device.