MF40B20

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A compact maintenance-free automotive battery engineered with expanded grid technology to deliver dependable starting power for light Japanese and Korean passenger vehicles. Featur e Specification Brand / Series SuperCharge Gold Plus (Automotive) Model Code MF40B20 (Cross-referenced with NS40Z / Group 2383) Nominal Voltage 12V Capacity (20-hour rate) ~35 Ah – 40 Ah Cold Cranking Amps (CCA) 390 A – 400 A Battery Type Maintenance-Free (SMF Calcium) Terminal Type Standard Small / Regular SAE Terminal (Right-Hand Positive Layout) Approximate Weight ~9.0 kg to 9.8 kg Physical Dimensions Length: 197 mm Width: 129 mm Height: 203 mm Total Height (including terminals): 227 mm Key Design Features Compact Asian Vehicle Fitment: Built to match the narrow battery tray footprint and terminal positioning for small passenger cars and light commercial applications. Expanded Grid Technology (EXG): Utilizes lead-calcium expanded plates to maximize grid strength, reduce internal corrosion, and minimize fluid loss. Maintenance-Free Structure: Completely sealed casing design prevents electrolyte evaporation, removing the need for manual water top-ups throughout its operating life. Show more