OPTIMA D31A DEEP CYCLE BATTERY 900CCA Optima Batteries are the ultimate power source, built for superior performance and longer life in extreme operating conditions. Optima batteries are designed with SpiralCell technology, where spiral-wound cells replace the flat battery plates found in most traditional batteries. This unique design offers a number of performance advantages in deep cycle, marine and starting applications including: Optima batteries provide: Greater vibration resistance – More efficient starting power – Longer battery life – Extreme heat resistance – Greater running time – Faster recharge – Maintenance Free – Fully Sealed design * Deep-cycle and cranking power * Up to 3X longer life * 15 times more vibration-resistant * Virtually spillproof * Mountable in virtually any position * Maintenance-free * Faster recharging * Optimal starting power * 300+ discharge/recharge cycles Specifications: Performance Data Cold Cranking Amps: 900 Cranking Amps: 1125 Nominal Voltage: 12 volts Open Circuit Voltage (fully charged): 13.1 volts Internal Resistance (fully charged): 0.0025 ohms Capacity: 75 Ah (C/20) Reserve Capacity: BCI: 155 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off) Physical Characteristics Plate Design: High purity lead-tin alloy. Wound cell configuration utilizing proprietary SPIRALCELL TECHNOLOGY®. Electrolyte: Sulfuric acid, H2SO4 Case: Polypropylene Case Color: Light Gray Cover Color: “OPTIMA“ Yellow Group Size: BCI: 31 Post Type: 3/8 Stainless steel stud Weight: 27.1kg Length: 325mm Width: 165mm Height: 238mm