Hotel rooms and airports never have enough plug sockets. For phones, tablets, e-readers, and other USB gadgets, you can charge in bulk (and do away with packing multiple plugs and adaptors) by investing in this 4-port USB Charger (£12). It comes with slip-on plugs for each type of international electrical outlet. Extra bonus? It works at home too, so if you've still got gang extenders trailing across the floor, maybe it's time for an upgrade?