A Decade-Long Search for a Battery That Can End the Gasoline Era

[Watchman]

On a frigid day in early January, as she worked in her office in the Boston suburb of Billerica, Mass., Siyu Huang received a two-word text message. “Spinning wheels,” it said. Attached was a short video clip showing a car on rollers in an indoor testing center.
To the untrained eye there was nothing remarkable in the video. The car could have been getting its emissions tested at a Connecticut auto repair shop (except it had no tailpipe). But to Ms. Huang, the chief executive of Factorial Energy, the video was a milestone in a quest that had already occupied a decade of her life. CONTINUE READING