Toyota Prius plug-in hybrids averaging 65mpg in initial testing

Major carmakers are rushing to develop a new generation of plug-in hybrid vehicles including industry giants Toyota and GM, which hope to have the technology ready for sale by the end of the decade. GM appears to have the lead at the moment, forming a partnership with LG Chem to develop and manufacture long life lithium-ion batteries for its upcoming Chevrolet Volt. Toyota, meanwhile, has been relatively secretive about its plug-in hybrid advancement but has now revealed some details about its progress.