> It's the extreme precision ultra pure processing that makes it expensive, not the bulk materials. Batteries don't require 6N precision. Silicon anodes can b

> It's the extreme precision ultra pure processing that makes it expensive, not the bulk materials. Batteries don't require 6N precision. Silicon anodes can be 99% pure and work fine. Metallurgical silicon is ~99.9%. Only the bottom shelf ferrosilicon stuff is <99%. My point is that you're making assertions that you don't fully understand. Why would batteries suddenly need extreme precision ultra pure processing? That doesn't make sense. > It's the extreme precision ultra pure processing that makes it expensive, not the bulk materials. That's my whole point. The expensive part is left behind because it doesn't have anything to do with batteries. The part that's left over is fancy sand and a mylar-making machine. The same machine used to make the very cheapest solar cells, the kinds in old calculators. The kind of machine that made the monitor you're reading this on. Not the 9N part.