there are two categories: new energy battery index ETF and CS battery index ETF. The full name of the new energy battery index is the CSI new energy battery index, and the full name of the CS battery index is the CSI battery theme index, which is tracked by the ETF. There are two etfs for lithium batteries because there are two categories: new energy battery index ETF and CS battery index ETF. New energy battery index ETF includes battery ETF, battery ETF fund, lithium battery ETF and battery leader ETF.