San Francisco: Tech mogul Elon Musk has started discussing the possibility and potential of battery-powered electric airplanes and believes they could be viable in about five years. This weekend, Elon Musk updated his expected timeline for the energy density to improve enough to enable battery-powered airplanes, Electrek reported on Monday. When a user questioned Musk, “Is it possible for planes to fly off of a battery? Or is there not a powerful enough battery yet?” the Tesla and SpaceX CEO replied, “Yes, but still a bit too limited on a range. That will change in coming years as battery energy density improves.” Musk explained that jet fuel beats batteries when it comes to energy density. (IANS)