A 10,000mAh portable power bank with a built-in solar panel on the front, so it can top itself up in daylight when there is no socket nearby. It charges phones and other USB devices on the go, and the integrated LED light doubles as a torch for camping, walking or a power cut. The rugged black and orange casing is built for the outdoors, with a loop for clipping it to a rucksack, and it is compact enough for a glovebox or a coat pocket.