A123 makes a pretty good lithium battery that has a high-cycle life and can put out loads of power. What it's not so good at, however, is holding a lot of energy. At least, not when compared to ...

TOKYO -- Komatsu plans to expand production capacity for batteries at its U.S. unit by four times, eyeing the mining industry's growing push toward electrification and decarbonization. The ...

Tesla has greatly expanded the number of lithium-ion battery cells it's buying from Panasonic, the electric car maker announced today, hinting at a major increase in production of the Model S ...