If you do a lot of traveling then you may be interested in the Mu System, which is an ultra thin charger for smartphones and tablets.
The Mu System is designed to work in a wide range of countries and comes with a range of adapters to suit your traveling needs.
The Mu System is compatible with all makes and models of smartphone, tablets, MP3 players and pretty much all USB-charged devices. The Mu System consists of two parts: a power block with USB connector and separate plug attachments that are suitable for every socket type worldwide.
The creators of the MU System are offering the device on Indiegogo and they have already raised over $131,000, they had an original goal of $10,000, so it looks like the device will go into production.
You can find out more details about this international gadget charger at the link below, the device is available for $45.