12. Injection: Water content of electrolyte ≤20ppm. Injection volume: 5.4 ± 0.2g.(If the electrolyte leaks, the battery will generate heat.)

13. Sealing: Sealing pressure ≥ 6Mpa.(The port shall be flat and free of crack, and the shell and bottom shall be free from damage and scratch.)

14. Cleaning: Firstly clean with cleaning fluid, pure water and hot air, and then apply anti rust oil.

15. Coating: The cell should be covered with PVC heat shrinkable film.(The repair rate of defective heat shrinkable appearance shall not be higher than 0.5%.)

16. Formation: After the cell is coated, it will stand for 3-4 days, and then be charged and discharged.(pay attention to constant current and constant voltage during charging and discharging)