The PL6850 is designed to provide stable power on demand up to 120 amps to a vehicle electrical system to support module reprogramming. It is also designed specifically for fleet service battery charging with a maximum charge rate of 120 amps to quickly and effectively bring 4and 8-battery Group 31 packs back to full charge.; In power supply mode the PRO-LOGIX PL6850 provides power to maintain vehicle electrical system voltage at a preset level increasing its output in response to system load increases to maintain a stable power environment for successfully reprogramming. It features a voltage output range of 13.1-14.9V adjustable in 0.1V increments. allowing the operator to dial the output in exactly as specified by the supplier of the vehicle under service. It features fast load responsiveness for ultra-quick recovery from system demand increases. It also delivers its massive power with minimal voltage ripple (<100mV) providing a clean flow of power to the vehicle without risk of programming interference.; In charging mode the PL6850 utilizes advanced microprocessor-controlled logic to precisely deliver a fully automatic charging routine designed to optimally charge and maintain each battery or battery pack serviced. The PL6850 features the ability to properly charge a wide variety of lead acid battery types including Conventional AGM Spiral Wound Start-Stop Deep Cycle and Marine batteries – plus LiFePO4 lithium batteries – for virtually any lead acid battery type installed in a vehicle the PL6850 can deliver a proper beneficial charge. The PL6850 adapts its charging approach based on the needs of each battery or battery pack it services. Such adaptations can include activating a soft start mode on deeply discharged batteries a battery repair mode on older/distressed batteries and temperature compensation when charging in extreme temperatures. It also incorporates numerous features to make charging safer for the operator and the vehicle/battery being charged.