The sail is good.

1. Good power storage. The quality of the sail battery is quite good. The battery uses corrosion-resistant plates, has low internal resistance and has good starting performance. The internal resistance of the lunar landing battery is slightly higher and the starting performance is poor.

2. Good performance. The low-temperature starting performance of the sail battery is particularly outstanding, using internal components with extremely low resistance. The lunar landing battery has poor performance without a low-temperature system.