As of January 2013, IATA has made changes to the rules which regulate the transportation of lithium ion/metal batteries.
The new rules state that there must be no more than two batteries per package and these must be contained in equipment i.e. they must be inside and part of the electronic device which they power. There must be no spare or loose batteries whatsoever inside the packages.
The following list contains examples of the type of devices which could contain these batteries;
Digital Cameras, video cameras, mobile phones, PDA's, iPod's, iPad's, Notebook PC's, Portable DVD Players, MP3 Music Players, Nintendo 3DS, PlayStation Portable (PSP), electric sharpeners, electronic dictionaries, playstation 3, Nintendo Wii, Digital books, Kindles.
A failure to follow this advice could lead to prosecution and the confiscation of your goods. Please ensure you adhere to these regulations. For the official IATA rules and regulations surrounding this matter, please click here.