Pama Power N Go PNGP3

Best price: £37.49 | Capacity: 6,000mAh

Light and slender, this Pama Power N Go PNGP3 could be slipped into an inside jacket pocket and barely be noticeable. Charging through the 2.1A USB socket was only a touch behind the best, and the decent capacity makes it capable of reviving several devices on a single charge. A battery monitor is in the casing, but you don’t get any accessories apart from a charge lead, so you’ll have to provide whatever your kit needs.