Electric carmaker Tesla may be able to mass produce longer-life batteries with 50% more energy density in three to four years, its chief executive Elon Musk has suggested.

 

“400 Wh/kg with high cycle life, produced in volume (not just a lab) is not far. Probably 3 to 4 years,” Musk tweeted on Monday ahead of its anticipated “Battery Day” event, said a Reuters report.

 

Researchers have said the energy density of Panasonic’s “2170” batteries used in Tesla’s Model 3 is around 260Wh/kg, meaning a 50% jump from the current energy density which is key to achieving a longer driving range.

 

Tesla said its Battery Day will take place on the same day as its 2020 annual meeting of shareholders on September 22.