CHIBA:- Japanese giant Nissan on Wednesday unveiled a new electric car with an extended range and semi-autonomous driving functions, as it seeks to battle off competitors in a sector it once pioneered. The second-generation Nissan Leaf has a potential range of 400 kilometres (250 miles) between charges, compared with 250 kilometres for its previous version. It also boasts semi-autonomous driving capabilities such as keeping the vehicle automatically in one lane on the motorway or parking without human intervention.