All of their battery chemistry, technology, and capacity is from Panasonic in one way or another. The battery cell technology in current batteries is all Panas

All of their battery chemistry, technology, and capacity is from Panasonic in one way or another. The battery cell technology in current batteries is all Panasonic (i.e., the chemistry, cell container, etc.), but the battery assemblage is all Tesla. That's the stuff related to assembling the cells together into a battery, adding voltage controls, cooling assemblies, etc. As a point of comparison: Porsche's Taycan also uses Panasonic EVs, and has even an even better lap-racing performance than any Tesla, because Porsche's battery assemblage includes extra cooling assemblies that allow the car to be used for extended periods of high performance. While a Tesla can do full speed for 1 lap, a Taycan can do full speed until the battery dies.