A sample showing the insides of a new lithium-ion battery is on display during Toyota Motors' new Prius Plug-in Hybrid vehicle press preview at the company's showcase, Mega Webb in Tokyo, on December 14, 2009. Toyota announced the introduction of the third-generation Prius Plug-in Hybrid into key markets, such as Japan, US and Europe for use by governments and businesses. AFP PHOTO / TOSHIFUMI KITAMURA (Photo by TOSHIFUMI KITAMURA / AFP)