Tesla supplier Panasonic Corp. showcased its 4680 cylindrical battery that Elon Musk has called the lowest-cost way to power an electric car, the Wall Street Journal reports. What Happened The lithium-ion battery, which gets its name from being 46 millimeters in diameter and 80 millimeters high, is more significant than previous battery cells Panasonic has supplied to Tesla. The battery is around five times the size of those currently used by Tesla, Reuters reports. Interestingly, Panasonic had no plans to make cheaper Lithium Iron Phosphate (LFP) batteries for more affordable electric vehicles (EVs). It implies Tesla is buying those from China’s Contemporary Amperex Technology Co. (CATL) for some China-made Model 3 and Model Ys and entry-level Model 3s in the United States. Tesla sees the delivery of vehicles with battery packs composed of 4680 cells by 2022. However, Musk admitted challenges associated with manufacturing the new battery on a large …