With a portable charger, you’ll never have to see that depleted battery icon in the corner of your screen, the little red column growing smaller and smaller until – horror! – your device switches off and you’re stuck with nothing but your own thoughts for company. The Anker PowerCore+ 20100 can charge multiple devices quickly – up to 80 per cent in 35 minutes – and can do it multiple times during the course of your journey before it needs some juice itself. Anker PowerCore+ 20100