http://www.nikonchat.com/5400-coolpix/
Can the Coolpix 5400 be charged anywhere in the world?
Yes, but the plugs/prongs may be different and the current output from the walls may be different aswell.
In that case, it is always good to research the country in which you will travel to and see what wall plugs you will need to properly fit the cord and charge the camera with. You can buy small add-ons, sort of like an extension cord, to connect between the camera charger and the wall so that everything works okay.
This is a start:
http://www.powerstream.com/cv.htm
http://www.kropla.com/electric2.htm
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