More Australian car buyers are choosing electric models over petrol-powered vehicles. As ABC News reported, battery electric vehicles accounted for more than one in five new-car sales in July, marking the third straight month above that level as fuel costs rise and EV technology improves. What's happening? In July, Australians bought 23,510 battery electric vehicles, accounting for 21.7% of the new-vehicle market. That was just below June, when …