Charging tower at Sao Paulo international airport
These charging towers can be seen throughout Sao Paulo's Guarulhos airport. They have plenty of plug boxes, they are light and portable and they're positioned close to areas were passengers can comfortably sit while their gear gets charged. They even have different kinds of plugs (white for American style, red for European style) as you can see in the second picture. Kudos to the Sao Paulo airport authority for this nice touch that makes today's wired traveler's life easier.
