1-4 TROUBLESHOOTING Plate corrosion Sulfation Plate warpage and ative substance freeing Improper charging Long storage without operation Repeated overdischarge/ overcharge End of life Short circuit between cells Excessive charging current Insufficient electrolyte Defect of electrolyte Defective electrolyte Excessive ambient temperature Overdischarge Battery defect Crack or chipping of cell Improper water supply Damaged separator Overcharge Imperfect terminal connection Deposition of freed active substance at bottom of cell Fouled terminal or connecting plug Short circuit Electrolyte leakage and reduction Loosened or corroded connection