The first is to use a high current repair. This repair method is characterized by a relatively fast repair speed, the disadvantage is that the damage to the battery is relatively large.
The second method is small current pulse repair. It is characterized by basically non-destructive repair, and the disadvantage is that the repair time is too long.
The last one is by adding liquid repair method. That is, the repair solution is added through the liquid filling hole of the battery, and then the high current charge and discharge, this method needs a relatively long time to use, but the best effect.