New York-based lithium-ion automotive battery maker Ener1 Inc. has filed for bankruptcy protection, reports Bloomberg Businessweek. The company, which was granted a $118 million U.S. Energy Department grant to make batteries for electric vehicles, defaulted on its bond debt. Competition from Asian battery makers is also believed to have contributed to Ener1’s financial woes. China, Read on! →

You’ve left the headlights on overnight, and now your car’s engine won’t even crank. However, try it again an hour later and you hear some life or maybe even get the engine to turn over. What’s going on with that 12-volt lead-acid car battery? How car batteries work Most standard auto batteries work in the Read on! →