Kensington International Travel Adapter power adapter - BS 1363, NEMA 1-15,

The ports allow you to get a fast charge for one tablet or two smartphones. It makes it very easy to pack, and since the all the prongs retract back into the main housing when charging is completed, there's no chance of leaving loose pieces behind. It provides complete peace of mind, protecting your devices and their internal components from getting damaged due to a power surge.