I'd say higher demand led to more R&D. Supply alone wouldn't drive the price declines, as it used to cost too much to produce high battery capacity so there wa

I'd say higher demand led to more R&D. Supply alone wouldn't drive the price declines, as it used to cost too much to produce high battery capacity so there was a price floor. As demand increased, justifying the R&D helped break down that floor. That and government dollars.