1-4 TROUBLESHOOTING Plate corrosion Sulfation Plate wargage and active substance freeing Improper charging Repeated overdischarge/ Long storage without operation overcharge End of life Short circuit between cells Defect of electrolyte excessive Charging current insufficient electrolyte Defective Electrolyte Temperature Overdischarge capacity excessive Battery defect chipping of cell Crack or defective Separator Improper supply water Imperfect Overcharge connection of the terminal Deposition of free active substance at bottom of cell connecting plug Fouled terminal or Short circuit Electrolyte leakage end reduction Loosened or corroded connection