If you are in the middle of nowhere, or travelling abroad for any length of time, then this is the powerbank for you. The Solar SP-10000 Solar Powerbank is a portable power bank which can store 10,000mAh of power to be used as and when it is required. Foldable to keep it compact, it can be charged by sunlight or by the PC or laptop, as it has a USB cable for input and then two USB sockets for output, so two items can be charged at once. The LED display shows capacity and charging status and the Micro USB input makes it perfect for daily use. There is a large LED light on the back of the unit, which helps enormously when charging and using the item in the dark and it can be fully charged in approximately 4 hours in optimum sunlit conditions.