This portable solar power bank is equipped with four high-efficiency solar panels that can efficiently charge the built-in 8000mAh battery. When not in use, the device can be easily folded up and stored like a wallet. Its compact and durable design includes a built-in bright torch, and it can be conveniently attached to a backpack with the included nylon lanyard. The power bank also features four LED indicator lights that display the current battery level, and the battery itself is UL certified for safety and quality. Compliant with FCC, CE and RoHs.