GEM ensures minimum topping up frequency during high temperature abusive operation Patented Dry Charge technology assures 20% higher performance even after longest storage life Unique Polyethylene Separator with Glassmatt back-up provides longest life in the most arduous operating environment Double seal terminalpole design ensures leak-proof operation Patented grid alloy composition for long life and minimum water loss Optimum designed plates with maximum surface area ensure highest cranking power for instant ignition.