Features: - Extra heavy duty - multi purpose charger - Charge Stages: 8 Stages - Current Output: 20 Amp - Output Voltage (Nom): 12 Volt - Battery Type Supported: Gel/Calcium/Lead Acid - AGM Specifications: - Zero voltage minimum start – Can charge a completely flat battery. - LED display shows percentage of battery charge - Built-in microchip charging control and monitoring system. - Automatic adjustment of charging voltages according to environmental temperature. - Overcharge protection, protecting the battery from damage due to overcharging. - Reverse polarity, short circuit, overload and high temperature protection. - Optimally designed charging cycle designed for Lead Acid / AGM, Gel, & Calcium, starting and deep cycle batteries. - Battery Testing function while charging (faulty batteries cause the full battery board display to flash).