Come and Check Our Promo Solutions.The weather radio can be powered by hand crank, solar panel, USB charging cable. But for continuous long-term running, it's better to charge the radios with the provided charging cable. The other 3 charging ways are mostly for emergency power source. Built with 2000mAh replaceable Li-ion battery, the emergency radio can incredibly keep working over 10hrs. It's also a powerful power bank to charge any tablet, phone or other USB devices when they need some extra juice.this solar radio is a great alternative of flashlight which can constantly work over 10hrs and the farthest lighting range exceeds 10 meters. Pls check inventory and detailed info with us before placing your orders.