Tom Krisher

AP Auto Writer

Tesla Chief Executive Officer Elon Musk is expected to announce a breakthrough in electric vehicle battery chemistry on Tuesday Sept. 22 that could bring down the cost of the vehicles and increase their range and durability. At an event called “battery day,” Musk likely will show off the new technology, which could increase the traveling range per charge and durability of its batteries.

Tesla Expected to Unveil Breakthrough Battery Chemistry

The tech could bring down the cost of the vehicles and increase their range and durability.

A Google driverless car in development.

Michigan Plans Dedicated Road Lanes for Autonomous Vehicles

The vehicles would all be linked to a central computer system and would share data from sensors.

In this Monday, May 11, 2020 file photo, a man wearing a mask walks through the Tesla plant parking lot in Fremont, Calif. On Wednesday, July 22, 2020, the electric car maker announced it has picked the Austin, Texas, area as the site for its largest auto assembly plant employing at least 5,000 workers.

Tesla Tabs Texas for Massive Gigafactory

The plant will span more than four million square feet.

Ford Revives Bronco

The brand takes aim at Jeep.

The damage resulting from a lithium-ion battery fire in a FedEx truck is show in these photos taken June, 2, 2016. Left: The fire damage to the FedEx truck and its contents. Right: The contents of the truck were removed by firefighters following the fire. Photos courtesy of FedEx.

Fire Triggers Call for Stronger Battery Rules

Had the batteries caught fire while in the air, they could have caused the plane to crash.

In this Sept. 27, 2018 file photo, robots weld the bed of a 2018 Ford F-150 truck on the assembly line at the Ford Rouge assembly plant in Dearborn, Mich.

Infected Workers, Parts Shortages Slow Auto Restart

The return from a two-month production shutdown hasn’t gone according to plan.

This photo shows vehicles in the parking lot of the Tesla electric car plant Wednesday, May 13, 2020, in Fremont, Calif.

Tesla Factory Dispute May Be Over

It's not clear whether Tesla or CEO Elon Musk will face any punishment for reopening in defiance of county orders.

This Dec. 12, 2018, file photo shows traffic on the Hollywood Freeway in Los Angeles. The Trump administration is rolling back tough Obama-era mileage standards and gutting one of the United States' biggest efforts to slow climate change. The administration released its relaxed mileage rules Tuesday.

Trump Rolls Back Mileage Standards

It's a win for Americans who like their SUVs and pickup trucks.

In this March 26, 2020 file photo, President Donald Trump speaks about the coronavirus in the James Brady Briefing Room, in Washington. Trump on Friday, March 27, invoked the Defense Production Act after claiming that General Motors wasn't moving fast enough to make much-needed ventilators in response to the coronavirus pandemic. Yet experts on managing factory production say GM is already making an extraordinary effort for a company that normally isn't in the business of building ventilators.

Trump Pressures GM

Experts say GM is already moving 'lightening fast.'

President Donald Trump speaks about the coronavirus in the James Brady Press Briefing Room, Friday, March 27, 2020, in Washington.

Trump Tries to Force GM to Make Ventilators

He used the Defense Production Act because 'GM was wasting time.'

President Donald Trump speaks about the coronavirus in the James Brady Briefing Room, Wednesday, March 25, 2020, in Washington.

Trump Accuses GM of Overpromising

President Trump attacked General Motors Friday, alleging that the company promised to build thousands more breathing machines than it can deliver for coronavirus patients and that it wants too much money for them.

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Automakers Want Restart

The plants would reopen in early or mid-April.