There are few things more frustrating than finding yourself out and about on a business trip in a strange place and suddenly realising you’re almost out of power for your Important Little Gadgets. Sure you can find a nearby power socket if you’re brave enough to leech without blushing in a restaurant or airport lobby, but for most of us, it can induce something very close to gadget panic.

This Device Charging Business Case contains a hefty 6000 mAh rechargeable battery which is enough juice to give your smartphone four recharges before it needs charging itself. The case comes with multiple adapter heads to cope with eBook readers, phones, tablets or wireless headsets, and because it’s a case you also get lots of lovely storage room for all those crucial knick-knacks. The product recharges in 3.5 hours from a mains socket and costs $149.95 with lifetime guarantee.