I'm not sure Elon ever claimed that. Unless poster is talking about 4680 batteries, which are going to be used in production cars in Q1 or Q2 2022. But those a

I'm not sure Elon ever claimed that. Unless poster is talking about 4680 batteries, which are going to be used in production cars in Q1 or Q2 2022. But those are 20-30% more efficient/cheap compared to the 2170 form factor