batteries

Overheated lithium-ion batteries have been a problem for airplanes, cars and even "hoverboards." A chemical engineer at Stanford University thinks she has a solution to the problem.

The ability to store energy could revolutionize the way electricity is made and used. But for many utility companies and regular folks, energy storage is still too costly and difficult.

The Consumer Electronics Show has wrapped up its showcase of the latest in high-tech gizmos. But according to a survey from Fortune magazine, many Americans have a simpler wish: longer battery life.

Thousands of children swallow tiny batteries used in watches, calculators and toys each year. A team from MIT and Harvard is working on a pressure-sensitive insulating shield to prevent damage.

Unlike the technologies in laptops, smartphones and electric cars, the batteries inside them have been slow to evolve. In Silicon Valley, more than 40 companies are working on finding a battery breakthrough. And they're facing international competition.

After The New York Times published a scathing review of Tesla's Model S electric car, the automaker's CEO took to Twitter to slam the reporter. Disputed facts aside, the timing of the spat could hurt Tesla, which is under pressure to improve its financial performance.