enCharge Folding Solar Storage Power

Best price: £34.99 | Capacity: 8,000mAh

If you spend time away from any sort of power, then this solar-powered device could be the solution. Four solar panels fold neatly around the slender battery. It can also be charged via a USB, and it comes with Apple Lightning and 30-pin adapters for the micro USB lead. There’s a four LED battery monitor, but sadly charging was some way behind the rest of the devices on test.